GNU Collaborative International Dictionary of English

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1.       
   Boa (bōˈȧ), n.; pl. Boas. [L. boa a kind of water serpent. Perh. fr. bos an ox.]
   1. (Zool.) A genus of large American serpents, including the boa constrictor, the emperor boa of Mexico (Boa imperator), and the chevalier boa of Peru (Boa eques).
   
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   ☞ The name is also applied to related genera; as, the dog-headed boa (Xiphosoma caninum).
   
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   2. A long, round fur tippet; -- so called from its resemblance in shape to the boa constrictor.
   
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