Period

Period may refer to:

Common uses

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

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

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
Menstruation, also called a "period"
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 rotation
Wavelength, the spatial period of a periodic wave
Sentence (linguistics), especially when discussing complex sentences in Latin syntax

Period (school), a class meeting time in schools
Period, a professional ice hockey game comprises three periods of 20 minutes, with the clock running only when the puck is in play (similar uses occur in some other sports)