Period
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Look up period in Wiktionary, the free dictionary.
Look up periodic in Wiktionary, the free dictionary.
Period and periodic may refer to:
- A full stop, also known as a school period, a punctuation mark which indicates the end of a sentence(.).
- An interval of time that an event, chain of events, instance or happening, takes place within. It is measured between a start point and an end point and generally repeats, or progresses, in a cycle with the end point of one period being the start point of the next.
- A long complicated sentence, common in Latin writing and formerly often used in English writing.
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[edit] Business
- In business, particularly accounting, a period is the time interval(s) that the accounts, statement, payments, or other calculations cover. They won the situation. e.g. Payments, Receipts, Taxes - annually, quarterly or monthly. Salary or wages - monthly, fortnightly or weekly.
[edit] Education
- In schools, a period is the time allocated in the school timetable for instruction in a particular subject.
[edit] History
[edit] Performing arts
[edit] Music
[edit] Philosophy
[edit] Science
- Periodization, is the attempt to categorize or divide time, or history, into discrete named blocks.
[edit] Biology
- Menstruation, which usually occurs for discrete periods of time in mammals
- Gene for circadian rhythm
[edit] Chemistry
- Periodic acid, The name is not derived from period, but from iodine: per-iodic acid.
- Periodic table, a table of the chemical elements arranged based on their chemical and physical similarities and differences.
- Periodic table period, which is a row of elements in the periodic table.
[edit] Electronics
- Time between recurring edges of a clock signal. Measured in seconds. 1 / period = frequency.
[edit] Geology
- Geologic period, in geology
[edit] Mathematics
- Periodic function, in mathematics and electronics.
- Simple harmonic motion
- Periodic point
- Recurring decimal
- Periodic group
- In a group, the period of an element a is the smallest integer n such that an = e, the identity.
- Periods, a class of numbers
[edit] Physics
- In physics, a period is an interval of time between the recurrence of phases in a vibration, waveform etc.
[edit] Astronomy
- Orbital period, in astronomy
[edit] Optics
[edit] Literature
Period is also the name of the final novel in Dennis Cooper's George Miles Cycle.
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