[Greek katamēnia, from neuter pl. of katamēnios, monthly : kata-, according to, per; see cata- + mēn, month; see mē-2 in Indo-European roots.] cat'a·me'ni·al adj.
men·ses (měn'sēz) pl.n.
(used with a sing. or pl. verb) The monthly flow of blood and cellular debris from the uterus that begins at puberty in women and the females of other primates. In women, menses ceases at menopause. Also called catamenia.
[Latin mēnsēs, pl. of mēnsis, month; see mē-2 in Indo-European roots.]