Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
menses is a noun meaning "the monthly discharge of blood from the uterus of nonpregnant women from puberty to menopause". It carries one recorded sense.
the monthly discharge of blood from the uterus of nonpregnant women from puberty to menopause
“the women were sickly and subject to excessive menstruation”
“a woman does not take the gout unless her menses be stopped”
“the semen begins to appear in males and to be emitted at the same time of life that the catamenia begin to flow in females”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for menses come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.