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1. (n.) menstruation
the periodic discharge of blood and mucosal tissue from the uterus, occurring approximately monthly from puberty to menopause in nonpregnant women and females of other primate species.
2. menstruation
the period of menstruating.
Etymology: (1595–1605; < LL mēnsūrābilis= L mēnsūrā(re) to measure+-bilis -ble)
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| Definition of 'menstruation' |
Princeton's WordNet |
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1. (noun) menstruation, menses, menstruum, catamenia, period, flow
the monthly discharge of blood from the uterus of nonpregnant women from puberty to menopause
"the women were sickly and subject to excessive menstruation"; "a woman does not take the gout unless her menses be stopped"--Hippocrates; "the semen begins to appear in males and to be emitted at the same time of life that the catamenia begin to flow in females"--Aristotle
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| Definition of 'menstruation' |
Webster Dictionary |
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1. (noun) menstruation
the discharge of the menses; also, the state or the period of menstruating
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| Definition of 'menstruation' |
U.S. National Library of Medicine |
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1. menstruation
The periodic shedding of the ENDOMETRIUM and associated menstrual bleeding in the MENSTRUAL CYCLE of humans and primates. Menstruation is due to the decline in circulating PROGESTERONE, and occurs at the late LUTEAL PHASE when LUTEOLYSIS of the CORPUS LUTEUM takes place.
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Definitions of menstruation 
