| 释义 |
follicle
fol·li·cle F0228500 (fŏl′ĭ-kəl)n.1. Anatomy a. A small bodily cavity or sac.b. A crypt or minute cul-de-sac or lacuna, such as the depression in the skin from which the hair emerges.c. An ovarian follicle.d. A spherical mass of cells usually containing a cavity.2. Botany A dry, single-chambered fruit that splits along only one seam to release its seeds, as in larkspur and milkweed.
[Latin folliculus, little bag, diminutive of follis, bellows; see bhel- in Indo-European roots.]follicle (ˈfɒlɪkəl) n1. (Anatomy) any small sac or cavity in the body having an excretory, secretory, or protective function: a hair follicle. 2. (Botany) botany a dry fruit, formed from a single carpel, that splits along one side only to release its seeds: occurs in larkspur and columbine[C17: from Latin folliculus small bag, from follis pair of bellows, leather money-bag] follicular, folliculate, folˈlicuˌlated adjfol•li•cle (ˈfɒl ɪ kəl)
n. 1. Anat. a. a small cavity, sac, or gland. b. one of the small ovarian sacs containing a maturing ovum; Graafian follicle. 2. a dry seed pod consisting of a single carpel, splitting at maturity along the front of the seam. [1640–50; < Latin folliculus small bag, shell, pod =folli(s) bag, purse + -culus -cle1] fol•lic•u•lar (fəˈlɪk yə lər) fol•lic′u•late (-lɪt, -ˌleɪt) fol•lic′u•lat`ed, adj. fol·li·cle (fŏl′ĭ-kəl)1. A small, protective sac in the body. In most vertebrate animals, fertilized eggs develop in follicles located in the ovaries. In mammals, hair develops and grows from follicles in the skin.2. A dry fruit that has a single chamber and splits open along only one seam to release its seeds. Milkweed pods are follicles.follicleA small secreting cavity or sac. Ova (egg cells) develop in follicles in the female ovaries. See hair follicle.Thesaurus| Noun | 1. |  follicle - any small spherical group of cells containing a cavityvesicle, cyst - a small anatomically normal sac or bladderlike structure (especially one containing fluid)hair follicle - a small tubular cavity containing the root of a hair; small muscles and sebaceous glands are associated with themGraafian follicle - a vascular body in a mammalian ovary enclosing a developing egg |
TranslationsFollicle
follicle[′fäl·ə·kəl] (biology) A deep, narrow sheath or a small cavity. (botany) A type of dehiscent fruit composed of one carpel opening along a single suture. Follicle a dry, one-celled, many-seeded, and monocarpel-lary fruit that opens along a ventral suture. The seeds are located along the suture on the edges of the carpel. Follicles are typical of the magnolias; of such members of Ranunculaceae as cowslip, garden columbine, aconite and larkspur; and of some genera of Rosaceae, such as Physocarpus. The simplest follicles resemble a leaf folded in half lengthwise; the upper part corresponds to a stigma and the stem to a stalk. A large number of follicles may be positioned in a spiral on the axis of a blossom (as in the magnolia) to form a multiple fruit. Other types of fruits developed from follicles: nuts are follicles with a single seed, and beans are follicles with a different form of opening.
Follicle a round, oval, or pear-shaped anatomical structure present in various organs in man and other vertebrates, having varied functions. In mammals egg cells develop within the ovarian follicle, which consists of a group of cells; one of these is the egg cell and the rest are epithelial cells surrounding the egg, first in one layer and then in several. As the follicle matures, spaces between the cells become filled with a clear liquid, and the single-layered primordial follicle is transformed into a mature multi-layered follicle, the Graafian follicle. The follicle of the thyroid gland secretes thyroglobulin, a precursor of the thyroid hormones. Into the hair follicles, which enclose the hair roots and bulbs, empty excretory ducts of the sebaceous glands. Many lymphatic follicles are located in the mucous membranes of the digestive tract, the respiratory tract, and the urinary tract; for instance, follicles known as peyer’s patches are situated in the mucous membrane layer of the intestine.
See Folliclefollicle
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.fol·li·cle (fol'i-kĕl), [TA] 1. A more or less spheric mass of cells usually containing a cavity. 2. A crypt or minute cul-de-sac or lacuna, such as the depression in the skin from which the hair emerges. Synonym(s): folliculus [TA] [L. folliculus, a small sac, dim. of follis, a pair of bellows] follicle (fŏl′ĭ-kəl)n.1. Anatomy a. A small bodily cavity or sac.b. A crypt or minute cul-de-sac or lacuna, such as the depression in the skin from which the hair emerges.c. An ovarian follicle.d. A spherical mass of cells usually containing a cavity.2. Botany A dry, single-chambered fruit that splits along only one seam to release its seeds, as in larkspur and milkweed.follicle Anatomy 1. A sac, outpouching, cavity. See Hair follicle.2. Lymphoid follicle. See Lollipop follicle, Target follicle Reproduction medicine Ovarian follicle A structure in the ovaries which contains a developing egg. See Graafian follicle.fol·li·cle (fol'i-kĕl) [TA] 1. A more or less spheric mass of cells usually containing a cavity. 2. A crypt or minute cul-de-sac or lacuna, such as the depression in the skin from which the hair emerges.
Synonym(s): folliculus [TA] . follicle A sac-like depression or cavity, glandular or cystic in nature. Follicles may secrete new tissues as in the case of hair follicles, which synthesize and extrude hairs, and the Graafian follicles of the ovaries, which contain the eggs (ova) prior to ovulation.follicle - any small cavity or sac (see GRAAFIAN FOLLICLE, HAIR FOLLICLE, OVARIAN FOLLICLE).
- a dry fruit formed by the splitting of a single carpel along a line, usually ventral, to liberate its seeds.
FollicleThe small sac at the base of a hair shaft. The follicle lies below the skin surface.Mentioned in: Boilsfollicle1. A small gland. 2. A small cavity or deep narrow depression with excretory or secretory function. 3. A small nodule of lymphocytes and other cells occurring as a result of chronic inflammation. See papilla.
conjunctival follicle Small localized aggregation of lymphocytes, plasma and other cells appearing as white or grey elevations on the palpebral conjunctiva (tarsal area) as a result of chronic irritation (allergic, viral or mechanical such as contact lenses). See adult inclusion conjunctivitis; follicular conjunctivitis.
palpebral follicle's See meibomian glands.fol·li·cle (fol'i-kĕl) [TA] 1. A more or less spheric mass of cells usually containing a cavity. 2. A crypt or minute cul-de-sac or lacuna, such as the depression in the skin from which the hair emerges. follicle
Related to follicle: ovarian follicle, follicle stimulating hormoneWords related to folliclenoun any small spherical group of cells containing a cavityRelated Words- vesicle
- cyst
- hair follicle
- Graafian follicle
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