Source : Webster's Revised Unabridged Dictionary (1913)

Pressiroster \Pres`si*ros"ter\, n. [L. presssus pressed (p. p.
   of premere) + rostrum beak: cf. F. pressirostre. See 4th
   {Press}.] (Zo["o]l.)
   One of a tribe of wading birds ({Pressirostres}) including
   those which have a compressed beak, as the plovers.