[muh-nahr-kee, me-]

noun Physiology.

the first menstrual period; the establishment of menstruation.

Origin of menarche

1895–1900; men- + archḗ beginning
Related formsmen·ar·che·al, men·ar·chi·al, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for menarche



the first occurrence of menstruation in a woman's life
Derived Formsmenarcheal or menarchial, adjective

Word Origin for menarche

C20: New Latin, from Greek mēn month + arkhē beginning
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for menarche

1896, from German menarche (1895), from Greek men (genitive menos) "month" (see moon (n.)) + arkhe "beginning" (see archon).

Online Etymology Dictionary, © 2010 Douglas Harper

menarche in Medicine




The first menstrual period, usually during puberty.
Related formsme•narche•al adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

menarche in Science



The first menstrual period.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.