Etymology
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premenstrual (adj.)

also pre-menstrual, "preceding menstruation," 1865, from pre- "before" + menstrual. Premenstrual syndrome (1971) earlier was premenstrual tension (1928).

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Definitions of premenstrual

premenstrual (adj.)
of or relating to or occurring during the period just before menstruation;
From wordnet.princeton.edu