Source : Webster's Revised Unabridged Dictionary (1913)

Gull \Gull\, n. [Of Celtic origin; cf. Corn. gullan, W. gwylan.]
   (Zo["o]l.)
   One of many species of long-winged sea birds of the genus
   {Larus} and allied genera.

   Note: Among the best known American species are the herring
         gull ({Larus argentatus}), the great black-backed gull
         ({L. murinus}) the laughing gull ({L. atricilla}), and
         Bonaparte's gull ({L. Philadelphia}). The common
         European gull is {Larus canus}.

   {Gull teaser} (Zo["o]l.), the jager; -- also applied to
      certain species of terns.