and '''periodic''' may refer to:
#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 (which is where the term period came to describe a female's 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.
#A Full Stop , a punctuation mark which indicates the end of a sentence (.).
- 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.
- In schools, a ''period'' is the time allocated in the school timetable for instruction in a particular subject.
- Periodisation , is the attempt to categorise or divide time, or history, into discrete named blocks.
- 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.
- Time between recurring edges of a Clock Signal . Measured in Second s. .
- In Physics , a Period is an interval of time between the recurrence of phases in a vibration, Waveform etc.
Period is the name of the final novel in Dennis Cooper's George Miles Cycle.
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