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)
Accounting Period, often shortened to "period" in business, an accounting timeframe analogous to a month