From Wikipedia, the free encyclopedia
Period means different things.
- A period is a type of punctuation mark, also called a full stop.
- Period is a time in history: The book is from the Victorian period.
- A period (geology) is a series of rock strata, and the time during which the rocks were laid down. Dinosaurs lived during the Jurassic period.
- A period (menstruation) is the time every month when a woman of child-bearing age bleeds from her vagina.
- A period is the time it takes to finish one cycle of something that happens again and again. The Earth's sidereal period is about 365 days.
- Orbital period
- A period is the time it takes to play 1/3 of an ice hockey game.
- A period is a row in the chemical periodic table.
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