A young male chicken, especially one less than a year old.
From Middle English 'cok' with the diminutive suffix '-erel,' similar to how 'dog' becomes 'doggerel.' The term dates back to the 1400s in English.
The rooster's crow is his territory announcement—cockerels crow loudly at dawn to tell other roosters 'this is MY farm,' and their calls synchronize across a region so they don't waste energy fighting!
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