Noun

• 1. 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