• synonyms


[muh-nahr-kee, me-]
noun Physiology.
  1. the first menstrual period; the establishment of menstruation.
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Origin of menarche

1895–1900; men- + archḗ beginning
Related formsmen·ar·che·al, men·ar·chi·al, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for menarche


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

Word Origin

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).

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Online Etymology Dictionary, © 2010 Douglas Harper

menarche in Medicine


  1. The first menstrual period, usually during puberty.
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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


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