pre·​men·​stru·​um -ˈmen(t)-strə-wəm How to pronounce premenstruum (audio)
plural premenstruums or premenstrua -strə-wə How to pronounce premenstruum (audio)
: the period or physiological state that immediately precedes menstruation

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Cite this Entry

“Premenstruum.” Medical Dictionary, Merriam-Webster, Accessed 18 Jun. 2024.

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