(n.) A cock, so called from the clearness or loudness of his voice in crowing.

alpenglow arch aurora aurora australis aurora borealis aurora glory aurora polaris break of day brightening chanticleer cockcrow cocklight crack of dawn crepuscule dawn dawning dawnlight day-peep daybreak daylight dayspring first brightening first light foredawn glow half-light light merry dancers morn morning morning twilight northern lights peep of day polar lights polar ray prime southern lights sunrise sunup the small hours twilight vestibule of Day