What does Hair follicle mean in medical term?

Hair follicle means: The normal cycle for each follicle is five years of growth followed by rest. 90 follicles can grow hair simultaneously, with an average of six to fifteen cm per year. The Latin word for “bag” is follis.
(in Medical Dictionary)

What else does Hair follicle mean?

The hair follicle is a sac that nourishes the hair and allows for it to grow. Cells derived from skin’s epidermal outer layer line the follicle.
(in Medical Dictionary)

Siobhan Jordan, Molecular Medicine Today has observed that the human hair follicle (or hair follicle) is a dynamic structure. It generates hair by a complicated and intricately regulated process of growth and remodeling that’s controlled by many genes.
(in Medical Dictionary)

The tubular infolding and enclosing the roots of hair creates a deep, narrow pit.
(in Merlin Dictionary)