| cellularity | The degree, quality, or condition of cells that are present. (05 Mar 2000) |
|---|---|
| cellulase | <enzyme> Enzymes that break down cellulose and are involved in cell wall breakdown in higher plants, especially during abscission. Produced in large amounts by certain fungi and bacteria. Degradation of cellulose microfibrils requires the concerted action of several cellulases. (26 Mar 1998) |
| cellule | 1. In gross anatomy, a small but macroscopic compartment. Synonym: cellule. 2. In histology, a cell. Origin: L. A small chamber, dim. Of cella (05 Mar 2000) |
| cellulicidal | Destructive to cells. Origin: cellula + L. Caedo, to kill (05 Mar 2000) |
| cellulifugal | Moving from, or extending in a direction away from, a cell or cell body; denoting certain cells repelled by other cells, or processes extending from the body of a cell. Origin: cellula + L. Fugio, to flee (05 Mar 2000) |
| cellulin | <plant biology> A straight chain polysaccharide composed of _(1-4) linked glucose subunits. A major component of plant cell walls where it is found as microfibrils laid down in orthogonal layers. (13 Nov 1997) |
| cellulipetal | Moving toward, or extending in a direction toward, a cell or cell body. Origin: cellula + L. Peto, to seek (05 Mar 2000) |
| cellulite | 1. Colloquial term for deposits of fat and fibrous tissue causing dimpling of the overlying skin. Synonym: lipoedema. (05 Mar 2000) |
| cellulitic phlegmasia | Inflammatory swelling of the leg, following childbirth, due to septic inflammation of the connective tissue. Synonym: phlegmasia dolens. (05 Mar 2000) |
| cellulitis | <dermatology> An acute, diffuse, spreading, oedematous, suppurative inflammation of the deep subcutaneous tissues and sometimes muscle, which may be associated with abscess formation. It is usually caused by infection of an operative or traumatic wound, burn or other cutaneous lesion by various bacteria, but group A streptococci and Staphylococcus aureus are the most common aetiological agents. Cellulitis may also occur in immunocompromised hosts or it may follow erysipelas. It tends to spread to tissue spaces and cleavage planes owing to bacterial elaboration of large amounts of hyaluronidases that, break down polysaccharide ground substance, fibrinolysins that digest fibrin barriers and lecithinases that destroy cell membranes. Clinical manifestations include an area of oedema, warmth and tenderness with indistinct margins. Compare: erysipelas. (13 Nov 1997) |
| cellulocutaneous flap | A flap of skin and subcutaneous tissue. (05 Mar 2000) |
| celluloid strip | A clear plastic strip used as a matrix when inserting a silicate cement or acrylic resin cement in proximal cavity preparations of anterior teeth. (05 Mar 2000) |
| cellulosan | <plant biology> Class of plant cell wall polysaccharide that cannot be extracted from the wall by hot water or chelating agents, but can be extracted by aqueous alkali. Includes xylan, glucuronoxylan, arabinoxylan, arabinogalactan II, glucomannan, xyloglucan and galactomannan. Part of the cell wall matrix. (18 Nov 1997) |
| cellulose | <plant biology> A straight chain polysaccharide composed of _(1-4) linked glucose subunits. A major component of plant cell walls where it is found as microfibrils laid down in orthogonal layers. (13 Nov 1997) |
| cellulose acetate | A polymer commonly used as a support medium for electrophoresis. (05 Mar 2000) |
| gene rearrangement, alpha-chain T-cell antigen receptor | Ordered rearrangement of T-cell variable gene regions coding for the alpha-chain of antigen receptors. (12 Dec 1998) |
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| gene rearrangement, beta-chain T-cell antigen receptor | Ordered rearrangement of T-cell variable gene regions coding for the beta-chain of antigen receptors. (12 Dec 1998) |
| gene rearrangement, delta-chain T-cell antigen receptor | Ordered rearrangement of T-cell variable gene regions coding for the delta-chain of antigen receptors. (12 Dec 1998) |
| gene rearrangement, gamma-chain T-cell antigen receptor | Ordered rearrangement of T-cell variable gene regions coding for the gamma-chain of antigen receptors. (12 Dec 1998) |
| paraluteal cell | A steroid secretory cell of the corpus luteum that comes from the theca interna of the ovarian follicle at the time of ovulation. Synonym: paraluteal cell, paralutein cell. (05 Mar 2000) |
| paralutein cell | A steroid secretory cell of the corpus luteum that comes from the theca interna of the ovarian follicle at the time of ovulation. Synonym: paraluteal cell, paralutein cell. (05 Mar 2000) |
| reactive cell | <cell biology> A round to oval astrocyte cell with abundant cytoplasm containing glial filaments and an eccentric nucleus; may contain two nuclei in the cell hypertrophy of astrocytes. Synonym: gemistocyte, gemistocytic cell, reactive astrocyte, reactive cell. (05 Mar 2000) |
| genes, T-cell receptor | DNA sequences, in cells of the t-lymphocyte lineage, that code for T-cell receptors. The tcr genes are formed by somatic rearrangement (see gene rearrangement, t-lymphocyte and its children) of germline gene segments, and resemble ig genes in their mechanisms of diversity generation and expression. (12 Dec 1998) |
| genes, T-cell receptor alpha | DNA sequences encoding the alpha chain of the T-cell receptor. The genomic organization of the tcr alpha genes is essentially the same in all species and is similar to the organization of ig genes. (12 Dec 1998) |
| genes, T-cell receptor beta | DNA sequences encoding the beta chain of the T-cell receptor. The genomic organization of the tcr beta genes is essentially the same in all species and is similar to the organization of ig genes. (12 Dec 1998) |
| genes, T-cell receptor delta | DNA sequences encoding the delta chain of the T-cell receptor. The delta-chain locus is located entirely within the alpha-chain locus. (12 Dec 1998) |
| genes, T-cell receptor gamma | DNA sequences encoding the gamma chain of the T-cell receptor. The human gamma-chain locus is organised similarly to the tcr beta-chain locus. (12 Dec 1998) |
| Marchand's wandering cell | A cell of the mononuclear phagocyte system. (05 Mar 2000) |
| receiver cell | <plant biology> Cells in the photosynthetic tissues of plants into which the solutes from xylem are pumped. (18 Nov 1997) |
| receptor-CD3 complex, antigen, T-cell | Molecule composed of the non-covalent association of the T-cell antigen receptor (receptors, antigen, T-cell) with the CD3 complex (antigens, CD3). This association is required for the surface expression and function of both components. The molecule consists of up to seven chains: either the alpha/beta or gamma/delta chains of the T-cell receptor, and four or five chains in the CD3 complex. (12 Dec 1998) |