me·nar·che 
(mə-närkē)
(mə-närkē)n.
The initial onset of menstruation, usually occurring between the ages of 10 and 15.
[MEN(O)- + Greek arkhē, beginning (from arkhein, to begin).]
me·narche·al adj.
- hypernatremia
- hypernym
- hypernymic
- hyperon
- hyperope
- hyperopia
- hyperopic
- hyperostosis
- hyperostotic
- hyperphagia
- hyperpigmentation
- hyperpituitarism
- hyperpituitary
- hyperplasia
- hyperplastic
- hyperploid
- hyperploidy
- hyperpnea
- hyperpneic
- hyperpolarize
- hyperpyretic
- hyperpyrexia
- hyperpyrexial
- hyperreal
- hyperrealism