hair follicle

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follicle

 [fol´ĭ-k'l]
a sac or pouchlike depression or cavity. adj., adj follic´ular.
atretic ovarian follicle an involuted ovarian follicle.
dental follicle the structure within the substance of the jaws enclosing a tooth before its eruption; the dental sac and its contents.
gastric f's lymphoid masses in the gastric mucosa.
graafian follicle see graafian follicle.
hair follicle one of the tubular invaginations of the epidermis enclosing the hairs, and from which the hairs grow.
Diagram of a hair follicle showing layers of hair schematically. From Copstead, 1995.
lymph follicle (lymphatic follicle)
2. lymphatic nodule (def. 2).
Naboth's f's (nabothian f's) Naboth's cysts.
ovarian follicle the ovum and its encasing cells, at any stage of its development.
primary ovarian follicle an immature ovarian follicle consisting of an immature ovum and the few specialized epithelial cells surrounding it.
primordial ovarian follicle an ovarian follicle consisting of an ovum enclosed by a single layer of cells.
sebaceous follicle a hair follicle with a relatively large sebaceous gland, producing a relatively insignificant hair.
solitary f's
1. areas of concentrated lymphatic tissue in the mucosa of the colon.
2. small lymph follicles scattered throughout the mucosa and submucosa of the small intestine. Called also solitary glands.
thyroid f's discrete cystlike units filled with a colloid substance rich in iodine; they constitute the lobules of the thyroid gland.
vesicular ovarian follicle graafian follicle.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

hair fol·li·cle

[TA]
a tubelike invagination of the epidermis from which the hair shaft develops and into which the sebaceous glands open; the follicle is lined by a cellular inner and outer root sheath of epidermal origin and is invested with a fibrous sheath derived from the dermis.
Synonym(s): folliculus pili [TA]
Farlex Partner Medical Dictionary © Farlex 2012

hair follicle

n.
A deep narrow pit that is formed by the tubular infolding of the epidermis and that encloses the root of the hair.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

hair fol·li·cle

(hār fol'i-kĕl) [TA]
A tubelike invagination of the epidermis from which the hair shaft develops and into which the sebaceous glands open; the follicle is lined by cellular inner and outer root sheaths of epidermal origin and is invested with a fibrous sheath derived from the dermis.
Synonym(s): folliculus pili [TA] .
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

hair follicle

a sheath of epidermal tissue surrounding the root of a HAIR (2). The follicle is supplied by a sebaceous gland and erectile muscles for the hair. see SKIN.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

Hair follicle

A tube-like indentation in the skin from which a single hair grows.
Gale Encyclopedia of Medicine. Copyright 2008 The Gale Group, Inc. All rights reserved.