menarche

The term 'menarche' is a modern scientific formation directly from ancient Greek components. It combines mēn, meaning "month," which relates to the moon's monthly cycle and by extension to menstruation, with archē, meaning "beginning" or "origin." This compound was created in the 19th century to provide a precise, clinical term for the onset of the menstrual cycle. The word's logic is transparently literal, denoting "the beginning of the monthly cycle," and reflects the practice of using classical roots to create unambiguous terminology in medicine and physiology.

Structure: men (month) + arche (beginning) men: From Greek mēn (month), indicating a period or cycle. arche: From Greek archē (beginning, origin), indicating a start or first occurrence.