D defs.my
Entry 3 senses Webster, 1913

Menstrual

/mĕn'-stro͞o-əl/ · Men·stru·al · IPA /ˈmɛn.stɹu.əl/
01 a. Recurring once a month; monthly; gone through in a month; as, the menstrual revolution of the moon; pertaining to monthly changes; as, the …
  1. 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. 2.
    Of or pertaining to the menses; as, menstrual discharges; the menstrual period.
  3. 3.
    Of or pertaining to a menstruum.