Puff adder

Definition of Puff adder

(Zool.)	Any South African viper belonging to Clotho and allied genera. They are exceedingly venomous, and have the power of greatly distending their bodies when irritated. The common puff adder (Vipera arietans, or Clotho arietans) is the largest species, becoming over four feet long. The plumed puff adder (Clotho cornuta) has a plumelike appendage over each eye.
	A North American harmless snake (Heterodon platyrrhinos) which has the power of puffing up its body. Called also hog-nose snake, flathead, spreading adder, and blowing adder.

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