menstruation.
The periodic discharging of the menses, the flow of blood and cells from the lining of the uterus in unfertilized females of humans and other primates.
Meaning & usage
The periodic discharging of the menses, the flow of blood and cells from the lining of the uterus in unfertilized females of humans and other primates.
An instance of menstruation, the part of each month during which a fertile woman menstruates.
Where this word comes from
Etymology tree Proto-Indo-European *dwóh₁ Proto-Indo-European *dwi- Proto-Italic *dwi- Latin bi- Proto-Indo-European *meh₁-? Proto-Indo-European *mḗh₁n̥s Proto-Italic *mēns Proto-Italic *mēnsis Latin mēnsis Proto-Indo-European *-teros? Latin -tris Latin bimēnstrisbf. ▲ Latin annuusinflu. Latin mēnstruus Latin mēnstruum English menstruum Proto-Indo-European *-tis Proto-Indo-European *-Hō Proto-Indo-European *-tiHō Proto-Italic *-tiō Latin -tiō Latin -ātiōlbor. Old French -ationbor. Middle English -acioun English -ation ▲ Late Latin menstruatioinflu. English menstruation From menstruum + -ation, modelled after Late Latin menstruatio. The word is a cognate with French menstruation, Spanish menstruación, which displaced Old English mōnaþblōd (literally “monthblood”).
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.