signĭfĭcātōrĭus — Lewis & Short
signĭfĭcātōrĭus, a, um, adj.id.,
I denoting, signifying, significatory (late Lat.); with gen. (like significativus):
verbum factitationis significatorium,Tert. adv. Herm. 32; Ambros. Incarn. Dom. Sacr. § 98.