Editing Period (section)

== Science ==
* [[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