Definitions of menstrual

1. Recurring once a month; monthly; gone through in a month; as, the menstrual revolution of the moon; pertaining to monthly changes; as, the menstrual equation of the sun's place.

2. Of or pertaining to a menstruum.

3. Monthly: belonging to a menstruum.

4. Happening once a- month; lasting a month; pert. to a menstruum.