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

Period may refer to:

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

• 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

• 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
• 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

• 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

• Duration (disambiguation)
• Full stop (disambiguation)
• Periodicity (disambiguation)
• Periodization
• List of time periods
• History by period

This disambiguation page lists articles associated with the title Period.
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