COCKCROW
dawn, dawning, morning, aurora, first light, daybreak, break of day, break of the day, dayspring, sunrise, sunup, cockcrow
(noun) the first light of day; “we got up before dawn”; “they talked until morning”
Source: WordNet® 3.1
Etymology
Noun
cockcrow (plural cockcrows)
The time of day at which the first crow of a cockerel is heard; dawn or daybreak; first light
Synonyms
• break of day, sunup, sparrow-fart; see also dawn
Source: Wiktionary
Cock"crow, Cock"crow`ing, n.
Definition: The time at which cooks first crow; the early morning.
Source: Webster’s Unabridged Dictionary 1913 Edition