A rooster, cock or cockerel is a male
chicken (Gallus gallus), the female being a hen. The original term is "cock", from
Old English cocc, but this term tends to be avoided these days due to its use in
sexual slang. It is replaced by euphemisms: "cockerel" (which properly refers to a young male chicken) in Britain, and "rooster" (a relative neologism) in North America and Australia. "Roosting" is the action of perching aloft to sleep at night, and is actually done by both
sexes.
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