Block Block may refer to: * City block, an area surrounded but not divided by streets * Block * A Railway signalling#Blocks, used to control the movement of trains * In mathematics, either ** Block ** Block * Block * Block , a separate complete unit that is primarily not developed but instead used in various combinations
	Block and tackle A block and tackle is a system of two or more pulleys with a rope or cable threaded between them, usually used to lift or pull heavy loads. Although used in many situations, they are especially common on boats and sailing ships, where motorized aids are usually not available, and the task must be performed manually.
	Block diagram A block diagram is a pictorial representation of some process or model of a complex system. Geometric shapes are often used in the diagram to aid interpretation and clarify meaning of the process or model. The geometric shapes are connected by lines to indicate association and direction/order of traversal.
	Block Out Block Out is a Computer puzzle game videogame, similar to Tetris, but adding a sense of depth to its gameplay. It was created by California Dreams in 1989, designed by Alexander Ustaszewski and Mirek Zablocki. Blockout is the first official Tetris clone not directly published by Spectrum Holobyte.
	Block plane A block plane is a small woodworking hand plane which typically has the iron bedded at a lower angle than other planes, with the bevel up. It is designed to cut Wood grain and is typically small enough to be used with one hand. The block plane gets its name from its traditional use to level and remove cleaver marks from Butcher block that were built with the end grain facing up.
	Blockhouse In military science, a blockhouse is a small, isolated fort in the form of a single building. It is intended to serve as a defensive strongpoint against any enemy which does not possess siege equipment or, in modern times, artillery. If a fortification is intended to protect against such weapons as well, it is more likely to qualify as castle or, in modern times, a bunker.
	Bloemfontein Bloemfontein is one of South Africa's three capital, along with Pretoria and Cape Town. Bloemfontein serves as the judiciary capital, as well as the capital of the Free State Province province. The city's Sesotho language name is Mangaung, meaning "the place where cheetahs dwell".
	Blog Blog is the contraction universally used for weblog, a type of website where entries are made , displayed in a reverse chronological order. Blogs often provide commentary or news on a particular subject, such as food, politics, or local news; some function as more personal online diary.
	Blond Blond is a hair color found in certain mammals characterised by low levels of the dark pigment melanin and higher levels of the pale pigment pheomelanin, in common with red hair. From degrees of light brown to pale blond, the various hues of blondness are found in a little less than 1.8% of the world's population.
	Blood Blood is a highly specialised circulation biological tissue consisting of several types of cell suspended in a fluid medium known as blood plasma. The cellular constituents are: red blood cells, which carry respiratory gases and give it its red color, white blood cells , which fight disease, and platelets, cell fragments which play an important part in the clotting of the blood.
	Blood blister A blood blister is a type of blister that forms when subdermal biological tissue and blood vessels are damaged without piercing the skin. It consists of a pool of lymph, blood and other bodily fluids trapped beneath the skin. If punctured, it suppurates a dark red fluid.
	Blood Brothers Blood Brothers is a 1983 musical theatre, with book, lyrics, and music by Willy Russell.
	Blood Feud "Blood Feud" is the last episode of the second season of The Simpsons. However, according to , "Blood Feud" technically does not belong to any season, as it aired after the formal end of the second season and before the beginning of the third season.
	Blood knot A blood knot is most usefully employed for joining sections of monofilament line while maintaining a high portion of the lines inherent strength. Other knots used for this purpose can cause a substantial loss of strength. In fly fishing, this serves to build a leader of gradually decreasing diameter with the castable fly line attached at the large diameter end and the fly or hook at the small diameter end.
	Blood Lines Blood Lines is a short story collection by British crime-writer Ruth Rendell, published in 1995. The title story features her detective Inspector Wexford, and the final story is the acclaimed novella "The Strawberry Tree".
	Blood plasma Blood plasma is the liquid component of blood, in which the blood cells are suspended. Plasma is the largest single component of blood, making up about 55% of total blood volume. The term serum refers to blood plasma in which clotting factors have been removed. Blood plasma contains many vital proteins including fibrinogen, globulins and human serum albumin.
	Blood pressure Blood pressure is the pressure exerted by the blood on the walls of the blood vessels. Unless indicated otherwise, blood pressure refers to systemic arterial blood pressure, i.e., the pressure in the large artery delivering blood to body parts other than the lungs, such as the brachial artery .
	Blood sausage Black pudding, blood sausage or blood pudding is a sausage made by cooking down the blood of an animal with meat, fat or filler until it is thick enough to congeal when cooled. In the West, pig or cattle blood is most often used, sheep and goat blood are used to a lesser extent, while blood from poultry is very seldom used.
	Blood sport A bloodsport is a sport or entertainment which by design includes a risk that an animal or human may be killed or wounded. The term can refer to chase sports such as coursing or beagling, combat sports such as cockfighting, or other activities. It also includes spectacles that involve pitting one animal against another in a fight.
	Blood transfusion Blood transfusion is the process of transferring blood or blood-based products from one person into the circulatory system of another. Blood transfusions can be life-saving in some situations, such as massive blood loss due to Physical trauma, or can be used to replace blood lost during surgery.
	Blood type Blood group redirects here. A total of 29 human blood group systems are recognized by the International Society of Blood Transfusion . Each blood group is represented by a substance on the surface of red blood cells . These substances are important because they contain specific sequences of amino acid and Carbohydrates which are Antigen.
	Blood vessel The blood vessels are part of the circulatory system and function to transport blood throughout the body. The most important types, artery and veins, are so termed because they carry blood away from or towards the heart, respectively.
	Blood-brain barrier ** De Vivo disease is a rare condition caused by inadequate transport of glucose across the barrier, resulting in mental retardation and other neurological problems. Genetic defects in glucose transporter type 1 appears to be the main cause of De Vivo disease.
	Bloodbath Bloodbath is a Swedish death metal band from Stockholm, formed in 2000. These musicians created the three-song Breeding Death Extended play in 2000, with the vocals of Mikael kerfeldt, the drumming of Dan Swan|Nightingale]], and more), the heavy guitar sound of Anders "Blakkheim" Nystrm, and the bass guitar of Jonas Renkse.
	Blooded Blooded is an original novel based on the U.S. television series Buffy the Vampire Slayer.
	Bloodhound image = Bloodhound duke 1.jpg | image_caption = Bloodhound | name = Bloodhound | altname = Chien de Saint-Hubert St. Hubert Hound | country = Belgium / France | fcigroup = 6 | fcisection = 1 | fcinum = 084 | fcistd = akcgroup = Hound | akcstd = ankcgroup = Group 4 | ankcstd = ckcgroup = Group 2 - Hounds
	Bloodletting Bloodletting was a popular medicine practice from antiquity up to the late 19th century, involving the withdrawal of often considerable quantities of blood from a patient in the hopeful belief that this would cure or prevent a great many illnesses and diseases. The practice, of unproven efficacy, has been abandoned for all except a few specific Bloodletting#Phlebotomy today as modern treatments proved or believed to be effective have been introduced.
	Bloodroot Bloodroot is a perennial, herbaceous flowering plant native to eastern North America from Nova Scotia, Canada southward to Florida, United States. It is the only species in the genus Sanguinaria, and is included in the family Papaveraceae. It grows to 60 cm tall, with one large, sheath-like basal multi-lobed leaf up to 30 cm across.
	Bloods The Bloods are one of the Los Angeles, California, California street gangs. The Bloods started as a political organization for the protection of black neighborhoods. They are identified by the red color worn by their members. They also have a particular gang symbol.
	Bloodstock Bloodstock is an annual Heavy metal music music festival held over two days in The Assembly Rooms, Derby, England. The event features both big name mainstream, underground and new bands split between two stages, as well as a 'Metal Market' offering general genre merchandise and CDs.
	Bloomeria Bloomeria, a geophyte in the Themidaceae, was named for H. G. Bloomer an early San Francisco, California botanist. It consists of three species of California and Baja California: * Bloomeria clevelandii S. Watson * Bloomeria crocea Coville
	Bloomeria crocea Bloomeria crocea, also known as Goldenstar, is a geophyte of the Themidaceae from California and northern Baja California.
	Blót The bl?t (Old Norse plural same as singular) refers to Norse paganism sacrifice to the Norse gods and Elves. The sacrifice often took the form of a sacramental meal or feast. Related religious practices were performed by other Germanic peoples, such as the Anglo-Saxon paganism.
	Blouse A blouse most commonly refers to a woman's shirt, although the term is also used for some men's military uniform shirts.
	Blowlamp A blowlamp is a simple heating torch, which burns fuel with ambient atmosphere oxidizer. It will typically run on propane or butane cartridges, or be fed from a liquid petroleum gas cylinder via a hose. They produce a much larger, softer flame than an oxyacetylene torch and are used for low temperature applications - soldering, brazing, melting roof tar, or pre-heating large castings before welding, such as for repairing cast-iron cylinder heads.
	BlowOut BlowOut is a video game of the run and gun genre released in 2004 by Terminal Reality. External links
	Blowup Blowup is a 1966 United Kingdom-Italy art film directed by Michelangelo Antonioni, his first to feature an English language screenplay and also the first British film to feature full frontal female nudity. The film featured David Hemmings, Vanessa Redgrave, Sarah Miles, John Castle, and Jane Birkin.
	BLU-82 The BLU-82B/C-130 weapon system, nicknamed "Commando Vault" in Vietnam War and "daisy cutter" in 2001_war_in_Afghanistan, is a 15,000 pound conventional bomb, delivered from an MC-130 transport aircraft since it is far too heavy for the bomb racks on any bomber or attack aircraft.
	Blubber Blubber is a thick layer of vascularized fat found under the skin of all cetaceans, pinnipeds and sirenians. It covers the whole body, except for the appendages, loosely attached to the musculature. It can comprise up to 50% of the body mass of some marine mammals during some points in their lives.
	Blucher Blcher was an early railway locomotive built in 1814 by George Stephenson for Killingworth Colliery. Blcher was the first successful locomotive incorporating the following design features: *Flanged wheels keeping the locomotive on the track *Traction relying only on the friction of wheels on rails
	Blue Blue is any of a number of similar colors. When it is a pure color from a single source, it corresponds with a wavelength range of about 420490 nanometre. It is considered to be one of the three primary additive colors in RGB system; blue light has the shortest wavelength range of the three primary color.
	Blue Angels The United States Navy's Blue Angels , formed in 1946, is the world's first officially-sanctioned military aerial demonstration team. The United States Air Force has its own demonstration squadron, the U.S. Air Force Thunderbirds, which began operations in 1953.
	Blue Bloods The Blue Bloods were a professional wrestling tag team in World Championship Wrestling
	Blue Bulls The Blue Bulls, for sponsorship reasons named Vodacom Blue Bulls, or more popularly by the club's Afrikaans name Die Blou Bulle, are a South African rugby union team that participates in the annual Currie Cup tournament. They are governed by the Blue Bulls Rugby Union and are based at Loftus Versfeld Stadium in Pretoria, Gauteng province.
	Blue catfish The blue catfish is one of the largest species of North American catfish. Blue catfish are distributed primarily in the Mississippi River drainage including the Missouri River, Ohio River, Tennessee River, and Arkansas River rivers.
	Blue crab The blue crab is a crustacean found in the waters off the Atlantic Ocean and Gulf of Mexico. In its scientific name, calli is Greek for "beautiful", nectes for "swimmer", and sapidus is Latin for "savory". The natural predators of the blue crab include eels, drum, Leiostomus xanthurus, trout, some sharks, cownose sting rays and humans.
	Blue Devil Blue Devil is a superhero featured in material published by DC Comics. He first appeared in a preview story published in Fury of Firestorm #24, cover dated June 1984. That story lead directly into Blue Devil #1, also cover dated June 1984.
	Blue grama Blue grama is a long-lived, warm season, C4 carbon fixation perennial grass native to North America. It is most commonly found from Alberta east to Manitoba and south across the Rocky Mountains, Great Plains, and Midwest states to Mexico. Blue grama accounts for most of the net primary productivity in the shortgrass prairie of the central and southern Great Plains.
	Blue Jay The Blue Jay is a North American jay, a handsome bird with predominantly lavender-blue to mid-blue feathering from the top of the head to midway down the back. There is a pronounced crest on the head. The colour changes to black, sky-blue and white barring on the wing primaries and the tail.
	Blue Jean "Blue Jean" is a song from the album Tonight by David Bowie. One of only two tracks on the album to be written entirely by Bowie, it was released as a single ahead of the album. Loosely inspired by Eddie Cochran, the song was an uncomplicated composition, recalling earlier Bowie rockers such as The Jean Genie, and is generally regarded as the best part of a disappointing album.
	Blue Laws The Blue Laws of the Colony of Connecticut, as distinct from the generic term "blue law" that refers to any laws regulating activities on Sunday, were the initial statutes set up by the Theophilus Eaton with the assistance of the John Cotton in 1655 for the New Haven Colony, now part of Connecticut.
	Blue Nile The Blue Nile is a river originating at Lake Tana in Ethiopia. The river is called the Abay River in Ethiopia and the al-Bahr al-Azraq in Sudan. Although there are several feeder streams that flow into Lake Tana, the sacred source of the river is generally considered to be a small spring at Gishe Abbai at an altitude of approximately 1800 meter.
	Blue Peter Blue Peter is a popular, long-running BBC television programme for children, and airs on Children's BBC . It is named after the blue-and-white International maritime signal flags hoisted by ships in port when they are ready to sail. The reasoning behind the choice of title is that the programme is intended to be a voyage of adventure and discovery for the viewers, constantly covering new topics.
	Blue poppy The blue poppy is a plant of the family Papaveraceae.
	Blue Racer Blue racer might identfy: * the comic The Blue Racer * a species of snake, see Racer
	Blue ribbon In symbolism, blue ribbon is a term used to describe something of high quality. The usage came from The Blue Riband, a prize awarded for the fastest crossing of the Atlantic Ocean by passenger liners. The spelling blue riband is still encountered in most English-speaking countries, but in the United States, the term was altered to blue ribbon, and ribbons of this colour came to be awarded for first place in certain athletic or other competitive endeavours.
	Blue Ridge Mountains The Blue Ridge is a mountain chain in the eastern United States, part of the Appalachian Mountains, forming their eastern front from Georgia to Pennsylvania. To the west of the Blue Ridge, between it and the bulk of the Appalachians, lies the Great Appalachian Valley, bordered on the west by the Ridge-and-valley Appalachians province.
	Blue runner The blue runner is a fish found along the coastlines of the Atlantic Ocean, mostly in the inland waters of the east coast of North America and the west coast of Africa. The fish has a rounded body shape and can grow to up to 70cm long and weigh more than 5kg. The body is is silvery blue in color with a large eye.
	Blue shark The blue shark, Prionace glauca is a carcharhinid shark which is found in the deep waters of the world's temperate and tropical oceans. They prefer cooler waters and are not found, for example, in the Gulf of Mexico, the Adriatic or Red Sea. Blue sharks are known to migrate long distances, from New England to South America for example.
	Blue Tit The Blue Tit Parus caeruleus, is a 10.5 to 12 cm long passerine bird in the titmouse family Paridae. It is a widespread and common resident breeder throughout temperate and subarctic Europe and western Asia in deciduous or mixed woodlands. It is a resident bird, i.e., most birds do not bird migration.
	Blue walleye The blue walleye sometimes erroneously called the blue pike, was a subspecies of the walleye that went extinct in the 1970s. Until the middle of the 20th century, it was a commercially valuable fish with about a half million tonnes being landed during the period from about 1880 to the late 1950s, when the populations collapsed.
	Blue Whale The Blue Whale is a marine mammal belonging to the suborder of baleen whales. At up to 30 1 E1 m in length and 177 metric tonnes or more in weight, it is believed to be the Largest organism ever to have lived on Earth. Blue Whales were abundant in most oceans around the world until the beginning of the twentieth century.
	Blue-eyed grass The Blue-eyed Grasses, genus Sisyrinchium, are a substantial group of flowering plants of the iris family, Iridaceae. There are between 70 to 150 species, all native to the New World. Several Eastern U. S. species are threatened or endangered. The taxonomy of this genus is rather perplexing and confusing, as several of these species, such as Sisyrinchium angustifolium, form complexes with many variants named as species.
	Blue-eyed Mary The Blue-eyed Mary is a perennial plant native to Southern Europe. This species can spread quickly, and can reach 8 to 12 inches in height. The plant has a stem that snakes across the ground, giving it the alternative name Creeping Forget-Me-Not, and typically grows in the shade of trees.
	Blue-headed Vireo The Blue-headed Vireo, Vireo solitarius, is a small songbird. Adults are mainly olive on the upperparts with white underparts and yellowish flanks; they have a grey head, dark eyes with white "spectacles" and white wing bars. They have a stout bill and thick blue-grey legs. This bird, along with the Cassin's Vireo and Plumbeous Vireo, were formerly known as the Solitary Vireo.
	Blue-winged Teal The Blue-winged Teal is a small dabbling duck. The adult male has a greyish blue head with a white facial crescent, a light brown body with a white patch near the rear and a black tail. The adult female is mottled brown. Both sexes have a blue speculum feathers. In flight, they flap their wings especially rapidly.
	Bluebeard Bluebeard is the title character in a famous fairy tale about a violent nobleman and his over-curious wife. It was written by Charles Perrault and first published in 1697.
	Blueberry Blueberries are a group of flowering plants in the genus Vaccinium, sect. Cyanococcus. The species are native to North America and eastern Asia. They are shrubs varying in size from 10 cm tall to 4 m tall; the smaller species are known as "lowbush blueberries", and the larger species as "highbush blueberries".
	Bluebird The bluebirds are medium-sized, mostly insectivorous or omnivorous birds in the genus Sialia of the thrush family Turdidae. These are one of the relatively few thrush genera to be restricted to the Americas. As the name implies, these are attractive birds with blue, or blue and red, plumage.
	Bluebonnet The bluebonnet, a name common to several North American species of Lupin, is the state flower of Texas. They typically grow about 0.3 m tall. The name is possibly derived from the shape of the petals of the flower and their resemblance to the Bonnets worn by pioneer women to shield themselves from the sun.