What does boa mean?
The word boa refers to two quite different things: a large, powerful snake and a glamorous accessory. As a zoological term, a boa is any member of the family Boidae, a group of big, nonvenomous snakes found mainly in the Americas, Madagascar, and parts of Asia and Africa, which kill their prey by wrapping their muscular bodies around it and squeezing. The most famous example is the boa constrictor, an animal whose name has become so familiar that many people use it without ever seeing the creature itself. In its second sense, a boa is a long, fluffy scarf — typically of feathers, marabou, or fur — draped around the neck for warmth or, more often, for theatrical effect. Feather boas evoke cabaret, burlesque, Hollywood glamour, and fancy-dress parties, giving the word a playful, slightly campy connotation in this usage. The two senses are unrelated in meaning but share a Latin root, making boa a compact example of how a single word can span natural history and high fashion.
A large snake of the family Boidae that kills its prey by constriction.
"A boa can take several minutes to subdue its prey."
Often encountered in the fixed phrase 'boa constrictor'.
A long, fluffy scarf of feathers or fur worn around the neck.
"The actress stepped out of the limousine in a gown and a white feather boa."
Standard plural for both senses of the word.
"The reptile house houses several boas from South America."
Unlike most snakes, boa constrictors don't lay eggs — they give birth to live young.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of boa
The English word boa comes from the Latin boa, the name the ancient Romans gave to a large serpent, possibly one from North Africa mentioned by Pliny the Elder. It entered scientific nomenclature via New Latin when early naturalists classified these constricting snakes, and the fashion sense arose later by analogy with the snake's long, sinuous form. Related forms include the species name constrictor in boa constrictor, borrowed directly from Latin.
How boa is actually used
Both senses are informal-to-neutral in register; the fashion sense appears most often in contexts of costume, glamour, or performance.
Easily confused with boa
A bola is a throwing weapon of weighted cords used to entangle animals, while a boa is either a large constricting snake or a feathered neck scarf.