follicle /fol·li·cle/ (fol´ĭ-k'l) a sac or pouchlike depression or cavity.follic´ular
follicle [fol´ĭ-k'l]
atretic ovarian follicle an involuted ovarian follicle.
dominant ovarian follicle the growing ovarian follicle in a given menstrual cycle that matures completely and forms the corpus luteum.
gastric follicles lymphoid masses in the gastric mucosa.
graafian follicles vesicular ovarian f's; maturing ovarian follicles among whose cells fluid has begun to accumulate, leading to the formation of a single cavity and leaving the oocyte located in the cumulus oophorus.
hair follicle one of the tubular invaginations of the epidermis enclosing the hairs, and from which the hairs grow. 
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Folliculus pili (hair follicle). (A), Longitudinal section, comprising the infundibulum, isthmus, stem, and bulb; (B), transverse section of follicle, showing the hair shaft and surrounding follicular sheaths.
intestinal follicles see under gland.
lingual follicles nodular masses of lymphoid tissue at the root of the tongue, constituting the lingual tonsil.
lymph follicle , lymphatic follicle
1. lymph node.
2. lymphatic nodule (2).
Naboth's follicles , nabothian follicles cystlike formations due to occlusion of the lumina of glands in the mucosa of the uterine cervix, causing them to be distended with retained secretion.
ovarian follicle the oocyte and its encasing cells, at any stage in its development.
primary ovarian follicles immature ovarian follicles, each comprising an immature oocyte and the specialized epithelial cells (follicle cells) surrounding it.
primordial ovarian follicle an immature ovarian follicle that has not undergone recruitment and consists of an oocyte enclosed by a single layer of cells.
sebaceous follicle a hair follicle with a relatively large sebaceous gland, producing a relatively insignificant hair.
solitary follicles small lymph follicles scattered throughout the mucosa and submucosa of the small intestine.
thyroid follicles discrete, cystlike units of the thyroid gland that are lined with cuboidal epithelium and are filled with a colloid substance, about 30 to each lobule.
vesicular ovarian follicles graafian f's.
| primordial ovarian follicle n. An ovarian follicle in which the primordial oocyte is surrounded by a single layer of flattened follicular cells. |
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)
1. lymph node.
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.
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