Period may refer to:
Common uses Full stop, a punctuation mark commonly used to end a sentence (.) Era, length or span of time Periodization, classifying particular lengths of time into distinct historiographic or artistic periods List of time periods History by period Menstruation, commonly referred to as a "period"
Arts, entertainment, and media Period (music), concept in musical composition Periodic sentence or rhetorical period, concept in grammar and literary style Period drama, dramatic film or television production set in a historical period . or Period (album), by Kesha Period (mixtape), by City Girls Period, novel in Dennis Cooper's George Miles cycle Periods., 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), gene in Drosophila involved in regulating circadian rhythm Period (periodic table), horizontal row of the periodic table "Period-" or "per-iod-", chemical prefix where "per" refers to oxidation state and "iod" refers to iodine Unit of time or timeframe Period (geology), 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), block of time allocated for a specific course or other purpose Playing period, a division of playing time in games and sport Period (ice hockey) 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
. (disambiguation) Duration (disambiguation) Full stop (disambiguation) Periodicity (disambiguation)