Etymology

menses

M3E1N1S1E1S1

Today it means: The discharge of blood and cellular tissue that flows from the inner lining of the uterus out through the vagina, occurring typically once a month in uninseminated women; a menstrual flow. Full definition →

Latin mēnsis
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The story

  1. Latin · derived frommēnsis“month”
  2. English todaymenses

From Latin mēnsis (“month”), the plural being mēnsēs (“months”), corresponding to the approximately month-long span of the menstrual cycle. Compare month.

Etymology from Wiktionary, CC BY-SA 4.0.