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A punctuation mark (.) placed at the end of a declarative sentence to indicate a full stop or after abbreviations
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The monthly discharge of blood from the uterus of nonpregnant women from puberty to menopause
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An amount of time
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The interval taken to complete one cycle of a regularly repeating phenomenon
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A unit of geological time during which a system of rocks formed
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The end or completion of something
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(ice hockey) one of three divisions into which play is divided in hockey games