Your ShelfYour Projects
Webster's Dictionary (1865)

Mēn'stru-al, a.

adjective

a. [Fr. menstrual, menstruel, Sp. menstrual, It. menstruale, Lat. menstrualis. See MENSTRUOUS.] 1. Recurring once a month; monthly; as, the menstrual flux; gone through in a month; as, the menstrual orbit of the moon. Bentley.

  1. Pertaining to a menstruum. Bacon.
  2. (Astron.) Making a complete cycle of changes in a month; depending on the position of the moon with respect to the earth and sun; as, the menstrual argument of latitude; the menstrual equation of the sun’s place.