noun
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that which has a sweet sound; the Indian cuckoo (a long-tailed songbird of the family Cuculidae, which has a characteristic two or three-note call and deposits its eggs in the nests of crows which rear the young as their own).
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a bee (or wasp) which lays its eggs in the nest of another species; a cuckoo-bee.
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any of several large usu. grey and white birds of the family Columbidae, often domesticated and bred and trained to carry messages etc.; a dove; a pigeon.
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a large graceful waterbird of the genus Cygnus etc., having a long flexible neck, webbed feet, snow-white plumage; a swan.
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pleasant voice; melodious sounds.