MENSTRUAL

adj of or pertaining to a menstruum.

2. menstrual ·adj of or pertaining to the menses; as, menstrual discharges; the menstrual period.

3. menstrual ·adj 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.