UBS Dictionary of the Greek New Testament

Sense 1: rooster, cock

Semantic entry: 4.45

Semantic domains: Animals

Subdomains: Birds

Definition: male domestic fowl, dark brownish red, with orange-red neck hackles, a smallish red comb on the top of the head, and red lappets on each side under the beak; the hen is a lighter brownish red and has a smaller comb; significance in the Bible seems related to the fact that cocks crow very early in the morning, announcing the coming dawn

Further resources: fauna:3.3