- of or relating to menstruation or to the menses.
- Archaic. monthly.
Origin of menstrual
- of or relating to menstruation or the menses
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.)).
- Of or occurring in the time following menstruation.
- Of or relating to menstruation.