Source : Webster's Revised Unabridged Dictionary (1913)

Macaw \Ma*caw"\, n. [From the native name in the Antilles.]
   (Zo["o]l.)
   Any parrot of the genus {Sittace}, or {Macrocercus}. About
   eighteen species are known, all of them American. They are
   large and have a very long tail, a strong hooked bill, and a
   naked space around the eyes. The voice is harsh, and the
   colors are brilliant and strongly contrasted.

Source : WordNet®

macaw
     n : long-tailed brilliantly colored parrot of Central America
         and South America; among the largest and showiest of
         parrots