Why was "tantrum" trending last week?
late 14c., "pertaining to menses," also (in astronomy) "monthly," from Old French menstruel, from Latin menstrualis "monthly," especially "of or having monthly courses," from menstruus "of a month, every month, monthly, pertaining to a month," from mensis "month" (see moon (n.)).
postmenstrual post·men·stru·al (pōst-měn'strōō-əl)
Of or occurring in the time following menstruation.
menstrual men·stru·al (měn'strōō-əl) or men·stru·ous (-əs)
Of or relating to menstruation.