Scottish National Dictionary (1700–)
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First published 1968 (SND Vol. VII).
This entry has not been updated since then but may contain minor corrections and revisions.
ROOK-A-DOO, n. The cry of the cock, cock-a-doodledoo. Rare.Abd. 1952 Buchan Observer (26 Feb.):
Bold cock-a-lorie, flaps his wings, gapes his beak and lets rook-a-doo.