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menarche

[muh-nahr-kee, me-] /məˈnɑr ki, mɛ-/
noun, Physiology
1.
the first menstrual period; the establishment of menstruation.
Origin
1895-1900
1895-1900; men- + archḗ beginning
Related forms
menarcheal, menarchial, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for menarcheal

menarche

/mɛˈnɑːkɪ/
noun
1.
the first occurrence of menstruation in a woman's life
Derived Forms
menarcheal, 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
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Word Origin and History for menarcheal

menarche

n.

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

Online Etymology Dictionary, © 2010 Douglas Harper
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menarcheal in Medicine

menarche me·nar·che (mə-när'kē)
n.
The first menstrual period, usually during puberty.


me·nar'che·al adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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menarcheal in Science
menarche
  (mə-när'kē)   
The first menstrual period.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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