资料来源 : Webster's Revised Unabridged Dictionary (1913)

Tropic \Trop"ic\, a.
   Of or pertaining to the tropics; tropical.

   {Tropic bird} (Zo["o]l.), any one of three species of oceanic
      belonging to the genus {Pha["e]thon}, found chiefly in
      tropical seas. They are mostly white, and have two central
      tail feathers very long and slender. The yellow-billed
      tropic bird. {Pha["e]thon flavirostris} (called also
      {boatswain}), is found on the Atlantic coast of America,
      and is common at the Bermudas, where it breeds.

资料来源 : WordNet®

tropic bird
     n : mostly white web-footed tropical seabird often found far
         from land [syn: {tropicbird}, {boatswain bird}]