| drug-drug interaction | The effects that occur when two or more drugs are used together. Such effects include changes of absorption in the digestive tract, changes in rate of the drugs' breakdown in the liver, new or enhanced side effects and changes in the drugs' activity. (09 Oct 1997) |
|---|---|
| GI-tract target lesion | <radiology> Metastatic melanoma, primary neoplasm, spindle cell tumour (benign or malignant), lymphoma, carcinoid, carcinoma, metastasis, breast carcinoma, lung carcinoma, renal carcinoma, Kaposi's sarcoma, eosinophilic granuloma, ectopic pancreas (12 Dec 1998) |
| molybdenum target tube | An X-ray tube with an anode surface made of molybdenum instead of tungsten, used in mammography. (05 Mar 2000) |
| target | 1. An object fixed as goal or point of examination. 2. In the ophthalmometer, the mire. Synonym: target organ. 4. Anode of an X-ray tube. See: X-ray. Origin: It. Targhetta, a small shield (05 Mar 2000) |
| target behaviour | Operant in behaviour modification therapy, the prescribed behaviour. (05 Mar 2000) |
| target cell | An erythrocyte in target cell anaemia, with a dark centre surrounded by a light band that again is encircled by a darker ring; it thus resembles a shooting target; such cell's also appear after splenectomy. A cell lysed by cytotoxic T lymphocytes, as in graft rejection. Synonym: Mexican hat cell. (05 Mar 2000) |
| target cell anaemia | Any anaemia with a conspicuous number of target cells in the peripheral blood; characteristic of the thalassaemias and also found in several haemoglobinopathies. (05 Mar 2000) |
| target gland | The effector that functions when stimulated by the internal secretion of another gland or by some other stimulus. (05 Mar 2000) |
| target lesions of liver/spleen | <radiology> Lymphosarcoma (including Kaposi sarcoma), melanoma (12 Dec 1998) |
| target organ | A tissue or organ upon which a hormone exerts its action; generally, a tissue or organ with appropriate receptors for a hormone. Synonym: target. (05 Mar 2000) |
| target patient | In group therapy, the patient being analyzed in turn by another member patient. (05 Mar 2000) |
| target plasma | <radiobiology> Plasma used to trap a neutral atom beam. A background plasma of sufficiently high density and temperature can ionize neutral atoms more effectively than the Lorentz process (where v cross B creates effective electric field). (09 Oct 1997) |
| target regulation | <physiology> General term for an interaction between neurons and their targets by which target derived signals influence the differentiation of the innervating neurons. (18 Nov 1997) |
| target response | In conditioning, any behaviour or specific response chosen by the experimenter; its frequency is intended to increase or decrease by the judicious pairing with it of a reinforcer when it occurs. Synonym: target behaviour, target response. (05 Mar 2000) |
| abnormalities, drug-induced | Congenital abnormalities caused by medicinal substances or drugs of abuse given to or taken by the mother, or to which she is inadvertently exposed during the manufacture of such substances. The concept excludes abnormalities resulting from exposure to non-medicinal chemicals in the environment. (12 Dec 1998) |