Cock, Cock-crowing - Vine's Expository Dictionary of New Testament Words
Cock, Cock-crowing[ 1,,G220, alektor ]
a cock," perhaps connected with a Hebrew phrase for the oncoming of the light, is found in the passages concerning Peter's denial of the Lord, Matthew 26:34, Matthew 26:74-Matthew 26:75; Mark 14:30, Mark 14:68, Mark 14:72; Luke 22:34, Luke 22:60-Luke 22:61; John 13:38; John 18:27.
[ 2,,G219, alektorophonia ]
denotes "cock-crowing" (alketor, and phone, "a sound"), Mark 13:35. There were two "cock-crowings," one after midnight, the other before dawn. In these watches the Jews followed the Roman method of dividing the night. The first "cock-crowing" was at the third watch of the night. That is the one mentioned in Mark 13:35. Mark mentions both; See Mark 14:30. The latter, the second, is that referred to in the other Gospels and is mentioned especially as "the cock-crowing."