VIPER
viper
(noun) venomous Old World snakes characterized by hollow venom-conducting fangs in the upper jaw
Source: WordNet® 3.1
Etymology
Noun
viper (plural vipers)
A venomous snake in the family Viperidae.
Synonym: adder
A dangerous, treacherous, or malignant person.
(slang) A person who smokes marijuana.
Source: Wiktionary
Vi"per, n. Etym: [F. vipère, L. vipera, probably contr. fr. vivipera;
vivus alive + parere to bring forth, because it was believed to be
the only serpent that brings forth living young. Cf. Quick, a.,
Parent, Viviparous, Wivern, Weever.]
1. (Zoöl.)
Definition: Any one of numerous species of Old World venomous makes
belonging to Vipera, Clotho, Daboia, and other genera of the family
Viperidæ.
There came a viper out of the heat, and fastened on his hand. Acts
xxviii. 3.
Note: 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).
2. A dangerous, treacherous, or malignant person.
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.
Source: Webster’s Unabridged Dictionary 1913 Edition