| accommodative | Relating to accommodation. (05 Mar 2000) |
|---|---|
| accommodative asthenopia | Asthenopia due to errors of refraction and excessive contraction of the ciliary muscle. (05 Mar 2000) |
| accommodative convergence | The meter angle of convergence expressed in diopters; equal to the product of the meter angles of convergence times the interpupillary distance measured in centimeters. (05 Mar 2000) |
| accommodative convergence-accommodation ratio | The amount of convergence (measured in prism diopters of convergence) divided by the amount of accommodation (measured in diopters) required to direct both eyes upon an object. (05 Mar 2000) |
| accommodative strabismus | Strabismus in which the severity of deviation varies with accommodation. (05 Mar 2000) |
| refractive accommodative esotropia | That type of esotropia eliminated by correction of hypermetropic refractive error. (05 Mar 2000) |
| nonrefractive accommodative esotropia | That type of esotropia in which an abnormality of the accommodative-convergence mechanism is not eliminated by correction of refractive error. (05 Mar 2000) |
| 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) |