Word Study
koel
CIDE DICTIONARY
koel, n. [Native name in India.].
Any one of several species of cuckoos of the genus Eudynamys , found in India, the East Indies, and Australia. They deposit their eggs in the nests of other birds. [1913 Webster]
OXFORD DICTIONARY
koel, n. a dark-coloured cuckoo, Eudynamys scolopacea.
Etymology
Hindi k{oacute}il f. Skr. kokila
For further exploring for "koel" in Webster Dictionary Online