Source : Webster's Revised Unabridged Dictionary (1913)

Blowgun \Blow"gun`\, n.
   A tube, as of cane or reed, sometimes twelve feet long,
   through which an arrow or other projectile may be impelled by
   the force of the breath. It is a weapon much used by certain
   Indians of America and the West Indies; -- called also
   {blowpipe}, and {blowtube}. See {Sumpitan}.

Source : WordNet®

blowgun
     n : a tube through which darts can be shot by blowing [syn: {blowpipe},
          {blowtube}, {blow tube}]