viperine

Debbie's brow made viperine movements of its own.

The viperine qualities of this mysterious mischief-maker .

Its common name is viperine water snake or viperine snake.

Viperine snakes (which lack pit organs) also use thermal cues to guide strike behavior, but not to guide thermoregulation.

Toxalbumins are similar in structure to the toxins found in cholera, tetanus, diphtheria and botulinum; and their physiological and toxic properties are similar to those of viperine snake venom.