The Collaborative International Dictionary of English v.0.48:
Agkistrodon \Agkistrodon\ n. a genus of snakes comprising the copperheads. Syn: genus Agkistrodon, Ancistrodon, genus Ancistrodon. [WordNet 1.5]WordNet (r) 3.0 (2006):
Agkistrodon n 1: copperheads [syn: Agkistrodon, genus Agkistrodon, Ancistrodon, genus Ancistrodon]