Lewis Short
(adjective) : menstrŭālis, e, menstruus
* Monthly, every month, for a month.
* In gen.: epulae,i. e. free entertainment for a month,Plaut. Capt. 3, 1, 23: sphaera, Prud. στεφ. 10, 538.
* 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.
Charlton T. Lewis, Charles Short, A Latin Dictionary