出典:Wiktionary
出典:『Wiktionary』 (2026/03/18 23:28 UTC 版)
From menstruum + -ation, modelled after Late Latin menstruatio. The word is a cognate with French menstruation, Spanish menstruación, which displaced 古期英語 mōnaþblōd (literally “monthblood”).
menstruation (countable and uncountable, plural menstruations)
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