#menstruation__menses__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
  supertype:  #expelling__discharge__emission  any of several bodily processes by which substances go out of the body; "the discharge of pus"
  subtype:  #menorrhagia__hypermenorrhea  abnormally heavy or prolonged menstruation; can be a symptom of uterine tumors and can lead to anemia if prolonged
  subtype:  #oligomenorrhea  abnormally light or infrequent menstruation

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