Source : 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.

Egg-bird \Egg"-bird`\, n. (Zo["o]l.)
   A species of tern, esp. the sooty tern ({Sterna fuliginosa})
   of the West Indies. In the Bahama Islands the name is applied
   to the tropic bird, {Pha["e]thon flavirostris}.