menses
  月經
  men·ses /ˈmɛnˌsɪz/ 名詞
  月經
  Men·ses n. pl.  Med. The catamenial or menstrual discharge, a periodic flow of blood or bloody fluid from the uterus or female generative organs.
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  menses
       n : 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 [syn: menstruation,
            menstruum, catamenia, period, flow]