What is "puffing adder"

Adder \Ad"der\, n. [OE. addere, naddere, eddre, AS. n[ae]dre, adder, snake; akin to OS. nadra, OHG. natra, natara, Ger. natter, Goth. nadrs, Icel. na[eth]r, masc., na[eth]ra, fem.: cf. W. neidr, Gorn. naddyr, Ir. nathair, L. natrix, water snake. An adder is for a nadder.]

1. A serpent. [Obs.] ``The eddre seide to the woman.''
   --Wyclif. Gen. iii. 4. )

2. (Zo["o]l.)

   1. A small venomous serpent of the genus Vipera. The common European adder is the Vipera berus or Pelias berus. The puff adders of Africa are species of Clotho.

   2. In America, the term is commonly applied to several harmless snakes, as the milk adder, puffing adder, etc.

   3. Same as Sea Adder.

      Note: In the sculptures the appellation is given to several venomous serpents, -- sometimes to the horned viper ( Cerastles).

Hognosesnake \Hog"nose`snake"\ (Zo["o]l.) A harmless North American snake of the genus Heterodon, esp. Heterodon platyrhynos; -- called also puffing adder, blowing adder, and sand viper.