Source : Webster's Revised Unabridged Dictionary (1913)

Anguine \An"guine\, a. [L. anguinus, fr. anguis snake.]
   Of, pertaining to, or resembling, a snake or serpent. ``The
   anguine or snakelike reptiles.'' --Owen.

Source : WordNet®

anguine
     adj : of or related to or resembling a snake