noun
: any of various slender snakes: as
a. : a long bright-green harmless tree snake ( Philodryas viridissimus ) of So. America — called also emerald whip snake
b. : coachwhip snake
c. : a snake of a boigid genus ( Dryophis ) of Asia having a long leaflike head
d. : any of several small Australian snakes (genera Demansia and Denisonia ) that are venomous but not deadly