menarche Hear it!

menarche definition

men·ar·che (mə när′kē)

noun

the first menstrual period of a girl in puberty

Etymology: ModL < Gr mēn, month (see moon) + archē, beginning

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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