mensualis

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.

mensŭālis, e, adj. [mensis],

of a month, monthly (post-class.): numerus, Gromat. Vet. p. 393, 12: speculatio, id. ib. p. 415, 13: stipendia, Fulg. Contin. Virg. p. 142, 3.