A boa constrictor is a large snake that kills animals by wrapping itself round their bodies and squeezing them to death. Boa constrictors are found mainly in South and Central America and the West Indies.
boa constrictor in British English
noun
a very large snake, Constrictor constrictor, of tropical America and the Caribbean, that kills its prey by constriction: family Boidae (boas)
boa constrictor in American English
a large tropical American boa (Boa constrictor), pale brown with dark crosswise bars