Period

From Free net encyclopedia

Template:Wiktionarypar Template:Wiktionarypar Period and periodic may refer to:

• Period (music)
• Period (rhetoric)
• Historical period
• Menstrual cycle, relating to the reproductive system
• Full stop, also known as a period, that marks the end of a sentence

Science

• Orbital period, in astronomy
• Periodic table, in chemistry
• Periodic table period, in chemistry
• Periodic acid, in chemistry
• Geologic period, in geology

Mathematics

• Periodic function
• Recurring decimal
• In a group, the period of an element a is the smallest integer n such that aⁿ = e, the identity.
• In physics, a period is an interval of time between the recurrence of phases in a vibration, etc. This general sense applies to many of the above.

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Period is also the name of the final novel in Dennis Cooper's George Miles Cycle.

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