The Collaborative International Dictionary of English v.0.48:
Elaphe \Elaphe\ n. a genus of snakes comprising the Old World and American rat snakes. Syn: genus Elaphe. [WordNet 1.5]WordNet (r) 3.0 (2006):
Elaphe n 1: North American rat snakes [syn: Elaphe, genus Elaphe]