I.three-cleft, three-forked, threepointed; threefold, triple (poet.): “lingua (serpentis),” Verg. A. 2, 475; Plin. 11, 37, 65, § 171: “sermo, of the serpent in Paradise,” Prud. Ham. 203: “ordine trisulco quatit ora fragor, of the teeth,” Val. Fl. 2, 500: fulmen, Varr. ap. Non. 448, 20; cf. Fest. p. 352; “also called Jovis telum trisulcum,” Ov. Ib. 467: “ignes,” id. M. 2, 848: “Sicilia,” Claud. Rapt. Pros. 1, 145: fores, folding in three parts, Varr. ap. Serv. Verg. A. 1, 449: “ramus,” threeforked, Pall. Mart. 10, 24.
trĭ-sulcus , a, um (form trĭsulcis , e, Fulg. Rusp. Ep. 9), adj. ter (having three furrows),