Source : Webster's Revised Unabridged Dictionary (1913)

Boa \Bo"a\, n.; pl. {Boas} . [L. boa a kind of water serpent.
   Perh. fr. bos an ox.]
   1. (Zo["o]l.) A genus of large American serpents, including
      the boa constrictor, the emperor boa of Mexico ({B.
      imperator}), and the chevalier boa of Peru ({B. eques}).

   Note: The name is also applied to related genera; as, the
         dog-headed boa ({Xiphosoma caninum}).

   2. A long, round fur tippet; -- so called from its
      resemblance in shape to the boa constrictor.

Source : WordNet®

boa
     n 1: a long thin fluffy scarf of feathers or fur [syn: {feather
          boa}]
     2: any of several chiefly tropical constrictors with vestigial
        hind limbs

Source : Free On-Line Dictionary of Computing

boa
     
        [IBM] Any one of the fat cables that lurk under the floor in a
        {dinosaur pen}.  Possibly so called because they display a
        ferocious life of their own when you try to lay them straight
        and flat after they have been coiled for some time.  It is
        rumored within IBM that channel cables for the 370 are limited
        to 200 feet because beyond that length the boas get dangerous
        --- and it is worth noting that one of the major cable makers
        uses the trademark "Anaconda".
     
        [{Jargon File}]