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Period



 
  Period (from Greek pe???d??) or periodic may refer to:

Language and literature

  • Full stop
    Full stop

    A full stop or period , is the punctuation mark commonly placed at the end of several different types of Sentence s in English language and many other languages....
    , a punctuation mark indicating the end of a sentence or phrase
  • Periodic sentence
    Periodic sentence

    A periodic sentence is a sentence that is not grammatically complete until its end. Periodicity is accomplished by the use of parallel phrases or clauses at the opening or by the use of dependent clauses preceding the independent clause; that is, the kernel of thought contained in the subject /verb group appears at the end of a succession of...
    , a sentence that is not grammatically complete until its end
  • The final book in Dennis Cooper's George Miles cycle
    Dennis Cooper

    Dennis Cooper is an United States novelist, poet, critic, editor and performance artist....
     of novels
  • Period piece
    Period piece

    "Period piece" is phrase that is used to describe creative works....
     describes creative works set in a particular era.


Science and mathematics

  • Menstruation
    Menstruation

    See also "Mensuration", a term sometimes used to describe Measurement, particularly in the context of forestry.Menstruation is the shedding of the uterine lining ....
    , a phase of the menstrual cycle in which the uterine lining is shed
  • Orbital period
    Orbital period

    The orbital Periodicity is the time taken for a given object to make one complete orbit about another object.When mentioned without further qualification in astronomy this refers to the sidereal period of an astronomical object, which is calculated with respect to the stars....
    , a concept in astronomy.
  • Period (gene)
    Period (gene)

    Period is a gene in Drosophila which encodes a protein, PER , regulating circadian rhythm. There are some known alleles of the per gene that can make the circadian cycle longer or shorter than the usual cycle ....
    , a gene in Drosophila involved in regulating circadian rhythm
  • Period (geology), a subdivision of geologic time
  • The period of a periodic function
    Periodic function

    In mathematics, a periodic function is a function that repeats its values in regular intervals or periods. The most important examples are the trigonometric functions, which repeat over intervals of length 2π....
  • Periodic group
    Periodic group

    In group theory in mathematics, a periodic group or a torsion group is a group in which each element has finite set order . All finite groups are periodic....
     in group theory
  • Period (number)
    Period (number)

    In mathematics, a period is a number that can be expressed as an integral of an algebraic function over an algebraic domain. The concept has been promoted by Maxim Kontsevich and Don Zagier....
    , a concept in mathematics
  • Period (periodic table), a horizontal row of the periodic table
  • Periodic acid
    Periodic acid

    Periodic acid, or iodic acid is HIO4 or H5IO6.In dilute solution, periodic acid exists as H+ and IO4-....
    , an oxoacid of iodine
  • Period (physics), the reciprocal of frequency
  • Period of orbit
    Orbit (dynamics)

    In mathematics, in the study of dynamical systems, an orbit is a collection of points related by the evolution function of the dynamical system....


Other meanings

  • Period (music)
    Period (music)

    A period is a phrase consisting usually of an antecedent and consequent and totaling about 8 measures in length . Generally, the antecedent ends in a half cadence while the consequent ends in an authentic cadence....
    , a concept in musical composition
  • Periodicity
    Periodicity

    Periodicity is the quality of occurring at regular intervals or periods and can occur in different contexts:In timing devices:* A clock marks time at periodic intervals....
    , the quality of occurring at regular intervals
  • For historical period, see List of time periods
    List of time periods

    The categorization of time into discrete named blocks is called periodization. This is a list of such named time periods as defined in various fields of study....


See also

  • Periodization
    Periodization

    Periodization is the attempt to categorize or divide time into named blocks. The result is a descriptive abstraction that provides a useful handle on periods of time with relatively stable characteristics....