| anovular ovarian follicle | A follicle that does not contain an ovum. (05 Mar 2000) |
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| atretic ovarian follicle | A follicle that degenerates before coming to maturity; great numbers of such atretic follicle's occur in the ovary before puberty; in the sexually mature woman, several are formed each month. Synonym: corpus atreticum. (05 Mar 2000) |
| vesicular ovarian follicle | A follicle in which the oocyte attains its full size and is surrounded by an extracellular glycoprotein layer (zona pellucida) that separates it from a peripheral layer of follicular cells permeated by one or more fluid-filled antra; the theca of the follicle develops into internal and external layers. Synonym: folliculus ovaricus vesiculosus, graafian follicle, secondary follicle. (05 Mar 2000) |
| mature ovarian follicle | A follicle ready for ovulation; in the human ovary its antrum attains a diameter of 6 to 8 mm and presents a surface bulge; a first maturation (meiotic) division of the ovum usually occurs just prior to the rupture of the follicle. (05 Mar 2000) |
| granular layer of a vesicular ovarian follicle | The layer of small cells that forms the wall of an ovarian follicle. Synonym: granular layer of a vesicular ovarian follicle, granulosa, membrana granulosa, stratum granulosum ovarii. (05 Mar 2000) |
| growing ovarian follicle | A follicle having several layers of proliferating follicular cells surrounding the ovum, but separated from it by an extracellular glycoprotein layer (zona pellucida). (05 Mar 2000) |
| polyovular ovarian follicle | <gynaecology> A follicle containing more than one ovum. (05 Mar 2000) |
| primary ovarian follicle | An ovarian follicle before the appearance of an antrum; marked by developmental changes in the oocyte and follicular cells so that the latter form one or more layers of cuboidal or columnar cells; the follicle becomes surrounded by a sheath of stroma, the theca. Synonym: folliculus ovaricus primarius. (05 Mar 2000) |
| primordial ovarian follicle | A follicle in which the primordial oocyte is surrounded by a single layer of flattened follicular cells. (05 Mar 2000) |
| ovarian follicle | <biology, gynaecology> In mammals the group of cells around the primary oocyte proliferate and form a surrounding noncellular layer. A space opens up in the follicle cells and the whole structure is then the ovarian Graafian) follicle. (05 Jan 1998) |
| protein structure, tertiary | The stage in the structural development of a protein in which combinations of alpha helices and beta sheets pack together to form compactly folded globular units named domains. Small proteins consist of only one domain but larger proteins contain a number of domains which are usually connected by open lengths of polypeptide chain. This stage is a combination of the second and third folding levels of protein building. (12 Dec 1998) |
| tertiary | 1. Being of the third formation, order, or rank; third; as, a tertiary use of a word. 2. <chemistry> Possessing some quality in the third degree; having been subjected to the substitution of three atoms or radicals; as, a tertiary alcohol, amine, or salt. Cf. Primary, and Secondary. 3. <geology> Later than, or subsequent to, the Secondary. 4. <zoology> Growing on the innermost joint of a bird's wing; tertial; said of quills. Tertiary age. <medicine> The third and last stage of syphilis, in which it invades the bones and internal organs. Origin: L. Tertiarius containing a third part, fr. Tertius third: cf. F. Tertiaire. See Tierce. 1. A member of the Third Order in any monastic system; as, the Franciscan tertiaries; the Dominican tertiaries; the Carmelite tertiaries. See Third Order, under Third. 2. <geology> The Tertiary era, period, or formation. 3. <zoology> One of the quill feathers which are borne upon the basal joint of the wing of a bird. Source: Websters Dictionary (01 Mar 1998) |
| tertiary alcohol | An alcohol characterised by the trivalent atom group (05 Mar 2000) |
| tertiary amine monooxygenase | <enzyme> Requires NADPH and fad; can be separated from dimethylamine mono-oxygenase; oxidises a variety of tertiary alkylamines up to tributylamine Registry number: EC 1.14.99.- Synonym: trimethylamine mono-oxygenase (26 Jun 1999) |
| tertiary amputation | An amputation formerly performed after infection had been controlled. (05 Mar 2000) |