Whip-poor-will n. Zool. An American bird (Antrostomus vociferus) allied to the nighthawk and goatsucker; -- so called in imitation of the peculiar notes which it utters in the evening.  [Written also whippowil.]
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  whippoorwill
       n : American nocturnal goatsucker with gray-and-white plumage
           [syn: Caprimulgus vociferus]