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menarche

[muh-nahr-kee, me-]
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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

menarche

noun
  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

n.

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

menarche

(mə-närkē)
n.
  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

menarche

[mə-närkē]
  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.