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Ancistrodon conotortrix Explained

Ancistrodon conotortrix at English => English (Websters 1913) Of Explained:

Copperhead \Cop"per*head`\, n. [From its color.]
1. (Zo["o]l.) A poisonous American serpent ({Ancistrodon
conotortrix}), closely allied to the rattlesnake, but
without rattles; -- called also {copper-belly}, and {red
viper}.

2. A nickname applied to a person in the Northern States who
sympathized with the South during the Civil War. [U.S.]