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hair follicle

A small tube-shaped pocket in the skin from which a hair grows.

hair FOL-ih-kul noun

What it means

A structure that reaches from the skin's surface down into the dermis. At its base, living cells divide to make the hair. Each follicle has a small oil gland (sebaceous gland) and a tiny muscle that makes the hair stand up. Inflammation or infection of follicles is folliculitis; a boil is a deeper infection of one.

At a glance

Spanishfolículo piloso
Also writtenhair follicles

Related terms

psoriasis

A long-term immune-related skin disease in which skin cells grow too fast and pile up on the surface.

follicle

A small sac or cavity in the body, such as the pocket a hair grows from or the sac in the ovary that holds an egg.

pustule

A small raised bump on the skin filled with pus.

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