The Collaborative International Dictionary of English v.0.48:

Gull \Gull\, n. [Of Celtic origin; cf. Corn. gullan, W. gwylan.]
   (Zool.)
   One of many species of long-winged sea birds of the genus
   Larus and allied genera.
   [1913 Webster]

   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.
         [1913 Webster]

   Gull teaser (Zool.), the jager; -- also applied to certain
      species of terns.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Maa \Maa\, n. [See New a gull.] (Zool.)
   The common European gull (Larus canus); -- called also
   mar. See New, a gull.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Mew \Mew\, n. [AS. m?w, akin to D. meeuw, G. m["o]we, OHG. m?h,
   Icel. m[=a]r.] (Zool.)
   A gull, esp. the common British species (Larus canus);
   called also sea mew, maa, mar, mow, and cobb.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Larus canus
    n 1: the common gull of Eurasia and northeastern North America
         [syn: mew, mew gull, sea mew, Larus canus]