A peacock is a large male bird with bright blue and green feathers and a long, colorful tail that it can spread out like a fan. The word is often used to describe someone who shows off their looks or achievements.
“Peacock” joins “pea” (from Middle English *po*, related to Latin *pavo*, “peafowl”) with “cock,” meaning male bird. It originally referred only to the male, while “peahen” names the female.
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