boa constrictor

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A large boa (Boa constrictor) of tropical America that has brown markings and kills its prey by constriction.

Century Dictionary and Cyclopedia

1. n. A name popularly applied to any large serpent of the family Boidæ or Pythonidæ: same as boa, 2.

Wiktionary

1. n. A large tropical American snake, Boa constrictor, that kills its prey by squeezing them

GNU Webster's 1913

1. (Zoöl.) A large and powerful serpent of tropical America, sometimes twenty or thirty feet long. See Illustration in Appendix.

WordNet 3.0

1. n. very large boa of tropical America and West Indies