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Meaning of rainbird

rain•bird

Pronunciation: (rān'bûrd"), [key]
— n.
  1. any of several birds, esp. the black-billed cuckoo (Coccyzus erythropthalmus) and the yellow-billed cuckoo (C. americanus), that are said to call frequently before a rainstorm.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.