Source : Webster's Revised Unabridged Dictionary (1913)

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}.