Jisho

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Noun, Noun which may take the genitive case particle 'no'
1. menstruation; menstrual period
Wikipedia definition
2. MenstruationMenstruation is the shedding of the uterine lining. It occurs on a regular basis in sexually reproductive-age females of certain mammal species. This article focuses on human menstruation. People typically stop menstruating if they conceive or if they are breastfeeding. Menstruation lasts from puberty to menopause.
Read “Menstruation” on English Wikipedia
Read “月経” on Japanese Wikipedia
Read “Menstruation” on DBpedia

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