Period
Common uses
- Era, a length or span of time
- Full stop (or period), a punctuation mark
- 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
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
See also
- Duration (disambiguation)
- Full stop (disambiguation)
- Periodicity (disambiguation)
- Periodization
- List of time periods
- History by period
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