[muh-nahr-kee, me-] /məˈnɑr ki, mɛ-/

noun, Physiology.
the first menstrual period; the establishment of menstruation.
the first occurrence of menstruation in a woman’s life

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

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


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