menstruation
1. [ noun ] (biology,medicine) the monthly discharge of blood from the uterus of nonpregnant women from puberty to menopause
Synonyms: period catamenia flow menstruum menses
Examples:

"the women were sickly and subject to excessive menstruation" "a woman does not take the gout unless her menses be stopped"--Hippocrates

Related terms: discharge menorrhagia oligomenorrhea menstruate
Similar spelling:   menstruating
  menstruate
  menstrual
  menstrual_blood
  menstruum
  menstrual_flow
  menstrual_phase
  menstrual_cycle