T / trĭ-portentum
noun hapax

trĭ-portentum

gen. trĭ-portenti · gender neuter · decl. 2nd
an extraordinary omen; portent
an extraordinary omen or portent: deūm triportenta. Pac. ap. Varr. L. L. 7, § 59 Müll. (Trag. Rel. v. 381 Rib.).