menstruum

noun

1. (archaic) a solvent

   Less specific

   • solvent, dissolvent, dissolver, dissolving agent, resolvent

2. 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

   Synonyms

   • menstruation, menses, catamenia, period, flow

   Less specific

   • discharge, emission, expelling

   More specific

   • menorrhagia, hypermenorrhea, oligomenorrhea