Plumed adder

(Zool.) an African viper (Vipera cornuta, syn. Clotho cornuta), having a plumelike structure over each eye. It is venomous, and is related to the African puff adder. Called also horned viper and hornsman.

See also: Plume

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.