COPPERHEAD

Cop″per‐head′ (?), n. [] 1. 1. (Zoöl.) A poisonous American serpent (Ancistrodon conotortrix), closely allied to the rattlesnake, but without rattles; — called also copper-belly, and red viper.
2. 2. A nickname applied to a person in the Northern States who sympathized with the South during the Civil War.