the first menstrual period of a girl in puberty
Origin of menarcheModern Latin from Classical Greek m?n, month (see moon) + arch?, beginning
The initial onset of menstruation, usually occurring between the ages of 10 and 15.
Origin of menarchemen(o)- Greek arkhē beginning ( from arkhein to begin )
First attested 1900, from German Menarche (1895), formed from meno- (“menstruation") + Ancient Greek á¼€ÏÏ‡Î® (arche, “beginning").