Period

Look up period or periodic in Wiktionary, the free dictionary.

Period may refer to:

Common uses

  • Period (punctuation)
  • Era, a length or span of time
  • Menstruation, commonly referred to as a "period"

Arts, entertainment, and media

  • Period (music), a concept in musical composition
  • Periodic sentence (or rhetorical period), a concept in grammar and literary style.
  • Period, a descriptor for a historical or period drama
  • Period, a timeframe in which a particular style of antique furniture or some other work of art was produced, such as the "Edwardian period"
  • Period (Another American Lie), a 1987 album by B.A.L.L.
  • Period (mixtape), a 2018 mixtape by City Girls
  • Period, the final book in Dennis Cooper's George Miles cycle of novels
  • Periods., a comedy film series

Mathematics

  • In a repeating decimal, the length of the repetend
  • Period of a function, length or duration after which a function repeats itself
  • Period (algebraic geometry), numbers that can be expressed as integrals of algebraic differential forms over algebraically defined domains, forming a ring

Science

  • Period (gene), a gene in Drosophila involved in regulating circadian rhythm
  • Period (periodic table), a horizontal row of the periodic table
  • "Period-" or "per-iod-", in some chemical compounds, "per" refers to oxidation state, and "iod" refers to the compound containing iodine
  • Unit of time or timeframe
    • Period (geology), a subdivision of geologic time
    • Period (physics), the duration of time of one cycle in a repeating event
    • Orbital period, the time needed for one object to complete an orbit around another
    • Rotation period, the time needed for one object to complete a revolution
  • Wavelength, the spatial period of a periodic wave
  • Sentence (linguistics), especially when discussing complex sentences in Latin syntax

Other uses

  • Period (school), a class meeting time in schools
  • Period (ice hockey), a division of play in an ice hockey game
  • Accounting period, often shortened to "period" in business, an accounting timeframe analogous to a month
  • Periodt, slang of period used as an interjection

See also

  • Duration (disambiguation)
  • Full stop (disambiguation)
  • Periodicity (disambiguation)
  • Periodization
  • List of time periods
  • History by period
Topics referred to by the same term
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