n. 铜头(蝮)蛇, 南北战争时同情南方的北方人

[医] 铜头蛇(蝮属)

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.]