| radiobicipital reflex | Contraction of the biceps muscle which sometimes occurs in the elicitation of the brachioradial reflex. (05 Mar 2000) |
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| radiobiology | Study of the scientific principles, mechanisms, and effects of the interaction of ionizing radiation with living matter. (12 Dec 1998) |
| radiocalcium | A radioisotope of calcium, particularly calcium-45. (05 Mar 2000) |
| radiocarbon | A radioactive isotope of carbon; e.g., 14C. (05 Mar 2000) |
| radiocardiogram | A graphic record of the concentration of injected radioisotope within the cardiac chambers. (05 Mar 2000) |
| radiocardiography | The technique of recording or interpreting radiocardiograms. (05 Mar 2000) |
| radiocarpal | 1. Relating to the radius and the bones of the carpus. 2. On the radial or lateral side of the carpus. (05 Mar 2000) |
| radiocarpal articulation | The synovial joint between the distal end of the radius and its articular disk and the proximal row of carpal bones with the exception of the pisiform bone. Synonym: articulatio radiocarpea, carpal articulation, carpal joints, radiocarpal articulation, radiocarpal joint. (05 Mar 2000) |
| radiocarpal joint | The synovial joint between the distal end of the radius and its articular disk and the proximal row of carpal bones with the exception of the pisiform bone. Synonym: articulatio radiocarpea, carpal articulation, carpal joints, radiocarpal articulation, radiocarpal joint. (05 Mar 2000) |
| radiocephalpelvimetry | Synonym: pelvimetry. Origin: radio-+ cephal-+ pelvimetry (05 Mar 2000) |
| radiochemical purity | The proportion of the total activity of a specific radionuclide in a specific chemical or biological form. (05 Mar 2000) |
| radiochemistry | 1. The science of using radionuclides to synthesise labelled compounds for biochemical or biological research, or radiopharmaceuticals for clinical diagnostic studies. 2. The study of methods of labeling compounds with radionuclides. (05 Mar 2000) |
| radiochlorine | A radioactive isotope of chlorine, e.g., 36Cl. (05 Mar 2000) |
| radiocholangiography | Cholang iography obtained by the intravenous administration of an excreted radiopharmaceutical. Origin: radio-+ cholangiography (05 Mar 2000) |
| radiocholecystography | Visualization of the gallbladder by scintigraphic means using a radiopharmaceutical such as technetium-99m labelled iminodiacetic acid derivative. Origin: radio-+ cholecysoghraphy (05 Mar 2000) |