Source : Webster's Revised Unabridged Dictionary (1913)

Chuck-Will's-widow \Chuck`-Will's-wid"ow\, n. (Zool.)
   A species of goatsucker ({Antrostomus Carolinensis}), of the
   southern United States; -- so called from its note.

Source : WordNet®

chuck-will's-widow
     n : large whippoorwill-like bird of the southern United States
         [syn: {Caprimulgus carolinensis}]