Shell
Encyclopedia
Nature
- SeashellSeashellA seashell or sea shell, also known simply as a shell, is a hard, protective outer layer created by an animal that lives in the sea. The shell is part of the body of the animal. Empty seashells are often found washed up on beaches by beachcombers...
, a hard outer layer of a marine animal, found on beaches - ExoskeletonExoskeletonAn exoskeleton is the external skeleton that supports and protects an animal's body, in contrast to the internal skeleton of, for example, a human. In popular usage, some of the larger kinds of exoskeletons are known as "shells". Examples of exoskeleton animals include insects such as grasshoppers...
, an external covering of some animals- Mollusc shellMollusc shellThe mollusc shell is typically a calcareous exoskeleton which encloses, supports and protects the soft parts of an animal in the phylum Mollusca, which includes snails, clams, tusk shells, and several other classes...
- Gastropod shellGastropod shellThe gastropod shell is a shell which is part of the body of a gastropod or snail, one kind of mollusc. The gastropod shell is an external skeleton or exoskeleton, which serves not only for muscle attachment, but also for protection from predators and from mechanical damage...
- Turtle shellTurtle shellThe turtle shell is a highly complicated shield for the ventral and dorsal parts of the turtle, completely enclosing all the vital organs of the turtle and in some cases even the head. It is constructed of modified bony elements such as the ribs, parts of the pelvis and other bones found in most...
- Mollusc shell
- EggshellEggshellAn eggshell is the outer covering of a hard-shelled egg and of some forms of eggs with soft outer coats.- Insect eggs :Insects and other arthropods lay a variety of styles and shapes of eggs. Some have gelatinous or skin-like coverings, others have hard eggshells. Softer shells are mostly protein....
Business
- Royal Dutch ShellRoyal Dutch ShellRoyal Dutch Shell plc , commonly known as Shell, is a global oil and gas company headquartered in The Hague, Netherlands and with its registered office in London, United Kingdom. It is the fifth-largest company in the world according to a composite measure by Forbes magazine and one of the six...
, a multinational oil and gas company- Shell Oil CompanyShell Oil CompanyShell Oil Company is the United States-based subsidiary of Royal Dutch Shell, a multinational oil company of Anglo Dutch origins, which is amongst the largest oil companies in the world. Approximately 22,000 Shell employees are based in the U.S. The head office in the U.S. is in Houston, Texas...
, the U.S.-based subsidiary - Shell CanadaShell CanadaShell Canada Limited is the subsidiary of Dutch-based Royal Dutch Shell and one of Canada's largest integrated oil companies. Exploration and production of oil, natural gas and sulphur is a major part of its business, as well as the marketing of gasoline and related products through the company's...
- Shell NigeriaShell NigeriaShell Nigeria is the colloquial name for Royal Dutch Shell's Nigerian operations carried out through four subsidiaries—primarily through Shell Petroleum Development Company of Nigeria Limited...
- Shell Oil Company
- Shell corporation, a company which serves as a vehicle for business transactions
Entertainment
- Shell (theater)Shell (theater)In theater, a shell is a curved, hard surface designed to reflect sound towards an audience.Often shells are designed to be removable, either rolling away on wheels or flying into a flyspace...
, a curved surface for reflecting sound - The ShellsThe ShellsThe Shells were an American doo wop ensemble formed in Brooklyn in 1956.The group scored a US pop hit in 1957 with the song "Baby Oh Baby", released on Johnson Records; the song cracked the Top 30. Further singles passed with little success until 1960, when producers Donn Fileti and Wayne Stierle...
, a musical group - "Shells" (Angel), a TV episode
Places
- Shell, Ecuador
- Shell, CaliforniaShell, CaliforniaShell is the name of a railroad siding in Kings County, California.It is located on the San Joaquin Valley Railroad, east-southeast of Hanford....
, United States - Shell, WyomingShell, WyomingShell is an unincorporated community in Big Horn County, Wyoming, United States.The community is named for the abundance of fossil shells located in the area. Nearby exposed formations such as the Cloverly Formation and the Morrison Formation have yielded numerous fossils of dinosaurs and other...
, United States
People
- Art ShellArt ShellArthur "Art" Shell is an American former collegiate and professional football player in the American Football League and later in the NFL, a Hall of Fame offensive tackle, and a two-time former head coach of the Oakland Raiders...
(born 1946), American football player and coach - Donald ShellDonald ShellDonald L. Shell is a retired American computer scientist who designed the Shell sort sorting algorithm. He acquired his Ph.D. in Mathematics from the University of Cincinnati in 1959, after publishing the shell sort algorithm in the Communications of the ACM in July the same year.After acquiring...
(born 1924), American computer scientist - Karl ShellKarl ShellKarl Shell is an American theoretical economist, specializing in macroeconomics and monetary economics.Shell received an A.B. in mathematics from Princeton University in 1960. He earned his Ph.D...
(born 1938), American economist
Other uses
- Shell (computing)Shell (computing)A shell is a piece of software that provides an interface for users of an operating system which provides access to the services of a kernel. However, the term is also applied very loosely to applications and may include any software that is "built around" a particular component, such as web...
, a type of user interface - Shell (machinery), each half of a two-piece plain bearing
- Shell (projectile)Shell (projectile)A shell is a payload-carrying projectile, which, as opposed to shot, contains an explosive or other filling, though modern usage sometimes includes large solid projectiles properly termed shot . Solid shot may contain a pyrotechnic compound if a tracer or spotting charge is used...
, an explosive device - Electron shellElectron shellAn electron shell may be thought of as an orbit followed by electrons around an atom's nucleus. The closest shell to the nucleus is called the "1 shell" , followed by the "2 shell" , then the "3 shell" , and so on further and further from the nucleus. The shell letters K,L,M,.....
- Racing shellRacing shellIn watercraft, a racing shell is an extremely narrow, and often disproportionately long, rowing boat specifically designed for racing or exercise. It is outfitted with long oars, outriggers to hold the oarlocks away from the boat, and sliding seats...
, a watercraft - Shell accountShell accountA shell account is a user account on a remote server which gives access to a shell via a command-line interface protocol such as telnet or ssh....
, a user account on a remote server - Shotgun shellShotgun shellA shotgun shell is a self-contained cartridge loaded with lead shot or shotgun slug designed to be fired from a shotgun....
, a type of ammunition - Shell element, a component of the thin-shell structureThin-shell structureThin-shell structures are light weight constructions using shell elements. These elements are typically curved and are assembled to large structures...
construction method - A ring-like algebraic structure
See also
- Shell sortShell sortShellsort, also known as Shell sort or Shell's method is an in-place comparison sort. It generalizes an exchanging sort, such as insertion or bubble sort, by allowing the comparison and exchange of elements that lie far apart. Its first version was published by Donald Shell in 1959. The running...
, a sorting algorithm - On shell and off shellOn shell and off shellIn physics, particularly in quantum field theory, configurations of a physical system that satisfy classical equations of motion are called on shell, and those that do not are called off shell....
, a concept in quantum field theory