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Noun: menstruum (menstruums,menstrua)  men-stroo-um
  1. The monthly discharge of blood from the uterus of nonpregnant women from puberty to menopause
    "the women were sickly and subject to excessive menstruum";
    - menstruation, menses, catamenia, period, flow
  2. [archaic] A solvent

Derived forms: menstrua, menstruums

Type of: discharge, dissolvent, dissolver, dissolving agent, emission, expelling, resolvent, solvent

Encyclopedia: Menstruum