n.
Pronunciation: ˌ men(t)-strü- ' w ā -sh ə n, men- ' str ā -
Function: noun
Date: circa 1754
: a discharging of blood, secretions, and tissue debris from the uterus that recurs in nonpregnant breeding-age primate females at approximately monthly intervals and that is considered to represent a readjustment of the uterus to the nonpregnant state following proliferative changes accompanying the preceding ovulation also : PERIOD 6C