| Tissierella praeacuta | A species isolated from the intestinal tracts of infants and adults, gangrenous lesions, lung abscesses, and blood. Synonym: Tissierella praeacuta. (05 Mar 2000) |
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| Tissot spirometer | A very large water-sealed spirometer designed for accumulating expired gas over a long period of time; the counterbalancing of the bell (almost frictionless) is compensated for the bell's change in buoyancy as it emerges from the water, keeping the contained gas precisely at ambient atmospheric pressure. (05 Mar 2000) |
| Tissot, Jules | <person> Early 20th century French physiologist. See: Tissot spirometer. (05 Mar 2000) |
| tissue | A group of similar cells united to perform a specific function. (16 Dec 1997) |
| tissue adhesives | Substances used to cause adherence of tissue to tissue or tissue to non-tissue surfaces, as for prostheses. (12 Dec 1998) |
| tissue banks | Centres for acquiring, characterizing, and storing organs or tissue for future use. (12 Dec 1998) |
| tissue basophil | <cell biology, immunology> Resident cell of connective tissue that contains many granules rich in histamine and heparan sulphate. Release of histamine from mast cells is responsible for the immediate reddening of the skin in a weal and flare response. Very similar to basophils and possibly derived from the same stem cells. Two types of mast cells are now recognised, those from connective tissue and a distinct set of mucosal mast cells, the activities of the latter are T-cell dependent. (05 Jan 1998) |
| tissue conditioning (dental) | The use of a treatment material (tissue conditioner) to re-establish tone and health to irritated oral soft tissue, usually applied to the edentulous alveolar ridge. (12 Dec 1998) |
| tissue culture | <cell culture> Originally the maintenance and growth of pieces of explanted tissue (plant or animal) in culture away from the source organism. Now usually refers to the (much more frequently used) technique of cell culture, using cells dispersed from tissues or distant descendants of such cells. (18 Nov 1997) |
| tissue culture infectious dose | The quantity of a cytopathogenic agent, such as a virus, that will produce a cytopathic effect in 50% of the cultures inoculated. (05 Mar 2000) |
| tissue culture plastic | <cell culture> Polystyrene that has been rendered wettable by oxidation, a treatment that increases its adhesiveness for cells from animal tissues and without which anchorage dependent cells will not grow. Commercially achieved by treatment known as glow discharge. (18 Nov 1997) |
| tissue displaceability | The property of tissue that permits it to be moved from an initial or relaxed position or form. Synonym: compression of tissue. (05 Mar 2000) |
| tissue displacement | The change in the form or position of tissues as a result of pressure. (05 Mar 2000) |
| tissue distribution | Accumulation of a drug or chemical substance in various organs (including those not relevant to its pharmacologic or therapeutic action). This distribution depends on the blood flow or perfusion rate of the organ, the ability of the drug to penetrate organ membranes, tissue specificity, protein binding. The distribution is usually expressed as tissue to plasma ratios. (12 Dec 1998) |
| tissue donors | Individuals suppling living tissue, organs, cells, blood or blood components for transfer or transplantation to histocompatible recipients. (12 Dec 1998) |