Lewis & Short

menstrŭālis, e, adj. [menstruus], monthly, every month, for a month.

  1. I. In gen.: epulae, i. e. free entertainment for a month, Plaut. Capt. 3, 1, 23: sphaera, Prud. στεφ. 10, 538.
  2. II. Of or belonging to the monthly courses of women, menstrual (post-Aug.): solum animal menstruale mulier est, Plin. 7, 15, 13, § 63: mulier men strualis, menstrual, id. 19, 10, 57, § 177: pannus, Marc. Emp. 35: tempus, Vulg. Lev 15, 25.