Viper

There came a viper out of the heat, and fastened on his hand. Acts xxviii. 3.

* Among the best-known species are the European adder (Pelias berus), the European asp (Vipera aspis), the African horned viper (V. cerastes), and the Indian viper (Daboia Russellii).

Who committed
To such a viper his most sacred trust
Of secrecy. Milton.

Horned viper. (Zoöl.) See Cerastes. -- Red viper (Zoöl.), the copperhead. -- Viper fish (Zoöl.), a small, slender, phosphorescent deep-sea fish (Chauliodus Sloanii). It has long ventral and dorsal fins, a large mouth, and very long, sharp teeth. -- Viper's bugloss (Bot.), a rough-leaved biennial herb (Echium vulgare) having showy purplish blue flowers. It is sometimes cultivated, but has become a pestilent weed in fields from New York to Virginia. Also called blue weed. -- Viper's grass (Bot.), a perennial composite herb (Scorzonera Hispanica) with narrow, entire leaves, and solitary heads of yellow flowers. The long, white, carrot-shaped roots are used for food in Spain and some other countries. Called also viper grass.