A periodic physiologic hemorrhage, occurring at approximately 4-week intervals, and having its source from the uterine mucous membrane; usually the bleeding is preceded by ovulation and predecidual changes in the endometrium. SEE ALSO: menstrual cycle. SYN: menstrual period. [L. pl. of mensis, month]
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men·ses 'men-.sēz n pl but sing or pl in constr the menstrual flow
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n.
1. the blood and other materials discharged from the uterus at menstruation.
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men·ses (menґsēz) [L., pl. of mensis month] the monthly flow of blood from the genital tract of women; see menstruation.Medical dictionary. 2011.