Hair is a protein filament that grows from follicles found in the dermis. Hair is one of the defining characteristics of mammals. The human body, apart from areas of glabrous skin, is covered in …

Dec 26, 2025 · Learn everything you need to know about hair's structure, growth, function, and what it's made of.

Dec 19, 2025 · Hair, in mammals, the characteristic threadlike outgrowths of the outer layer of the skin (epidermis) that form an animal’s coat, or pelage. Hair is present in differing degrees on …

(Definition of hair from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

The meaning of HAIR is a slender threadlike outgrowth of the epidermis of an animal; especially : one of the usually pigmented filaments that form the characteristic coat of a mammal.

Hair is a stratified squamous keratinized epithelium made of multi-layered flat cells whose rope-like filaments provide structure and strength to the hair shaft. The protein keratin makes up …

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