Lewis Short
(adjective) : invectīvus, a, um, id.
* Scolding, abusive, reproachful, full of invectives (postclass.): oratio acer, et invectiva,Amm. 21, 10, 7: volumen,id. 22, 14, 2.—Subst.: in-vectīva, ōrum, n., invectives, abuse: quaedam in principem,Amm. 28, 1, 20.
Charlton T. Lewis, Charles Short, A Latin Dictionary