Nessus, i, m., = Νέσσος.
I A river in Thrace , now the Mesto or (Turkish) Karasu , Liv. 45, 29, 6; also called Nestos ( = Νέστος), Mel. 2, 2.—
II A Centaur, who, on offering violence to Dejanira, was slain by Hercules with a poisoned arrow , Ov. M. 9, 101 sq.; Hyg. Fab. 34.—Hence,
III Nessēus , a, um, adj., of Nessus : venenum, with the blood of Nessus, poisoned by the arrow of Hercules , Ov. H. 9, 163: palla tabe Nesseā illita, Sen. Herc. Oet. 716.