The Collaborative International Dictionary
cock-a-doodle-doo
cock-a-doodle-doo \cock-a-doodle-doo\ n. the crowing sound made by a rooster.
Douglas Harper's Etymology Dictionary
cock-a-doodle-doo
1570s, imitative; compare French cocorico, German kikeriki, Latin cucurire, Russian kikareku, Vietnamese cuc-cu, Arabic ko-ko, etc.
Wiktionary
cock-a-doodle-doo
interj. The cry of the rooster. n. (lb en onomatopoeia) The cry of the rooster.
WordNet
cock-a-doodle-doo
n. an imitation of the crow of a cock
Usage examples of "cock-a-doodle-doo".
His cock would have been singing cock-a-doodle-doos and doing the chicken dance.