copperhead
/ˈkɒpərhɛd/Definitions
1. noun
A venomous snake (Agkistrodon contortrix) found in eastern North America.
“While hiking in the woods, we encountered a copperhead coiled in our path.”
2. noun
A member of a radical or violent faction within a labor union or other organization.
“The copperhead was expelled from the union for his extremist views.”