'Copperhead' definitions:

Definition of 'copperhead'

From: WordNet
noun
Common coppery brown pit viper of upland eastern United States [syn: copperhead, Agkistrodon contortrix]
noun
Venomous but sluggish reddish-brown snake of Australia [syn: copperhead, Denisonia superba]

Definition of 'Copperhead'

From: GCIDE
  • Copperhead \Cop"per*head`\, n. [From its color.]
  • 1. (Zool.) A poisonous American serpent ({Ancistrodon conotortrix}), closely allied to the rattlesnake, but without rattles; -- called also copper-belly, and {red viper}. [1913 Webster]
  • 2. A nickname applied to a person in the Northern States who sympathized with the South during the Civil War. [U.S.] [1913 Webster]