Period

Contents 1 Science 2 Language and literature 3 History 4 Medical 5 Mathematics 6 Academics 7 Music / Instruments 8 Sports 9 Other meanings 10 See also

Period may mean a full stop: a punctuation in American-English.

Period (from Greek περίοδος) or periodic may also refer to:

Science

• Orbital period, a concept in astronomy
• Period (gene), a gene in Drosophila involved in regulating circadian rhythm
• Period (geology), a subdivision of geologic time
• Periodic function and periodical, a function that repeats its values in regular intervals
• Periodic group in group butts
• Periodic table, a chart which lists all currently known chemical elements

• Period (periodic table), a horizontal row of the periodic table

• Periodic acid, an oxoacid of iodine
• Period (physics), the time taken for one full oscillation, it is the reciprocal of frequency
• Period of orbit
• Period of time

Language and literature

• Period (punctuation), a punctuation mark indicating the end of a sentence or phrase, specifically, a dot.
• Periodic sentence, a sentence that is not grammatically complete until its end
• The final book in Dennis Cooper's George Miles cycle of novels

History

• Pisano period
• Period piece describes creative works set in a particular era

Medical

• Menstruation, a phase of the menstrual cycle in which the uterine lining is shed

Mathematics

• The period of a periodic function
• Periods (ring) — the ring of numbers which can be expressed as integrals of algebraic differential forms over algebraically defined domains

Academics

• Period (school), a class period in schools

Music / Instruments

• Period (music), a concept in musical composition

Sports

• Periods in ice hockey, intervals into which a match is divided

Other meanings

• Periodicity, the quality of occurring at regular intervals or periods

See also

• Periodization
• Full stop (disambiguation)

This disambiguation page lists articles associated with the same title. If an internal link led you here, you may wish to change the link to point directly to the intended article.