premenstrual syndrome
From Longman Dictionary of Contemporary Englishpremenstrual syndromepreˌmenstrual ˈsyndrome noun [uncountable] (abbreviation PMS) the tiredness, headache, bad temper etc experienced by some women in the days before their period SYN premenstrual tension British EnglishExamples from the Corpuspremenstrual syndrome• Two doctors have told her that she has premenstrual syndrome and that most women do.