| MHD | maintenance hemodialysis; mean hemolytic dose; mental health department; minimum hemolytic dilution;... |
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| MLD | manual lymph drainage; median lethal dose; metachromatic leukodystrophy; minimal lesion disease; min... |
| MPD | main pancreatic duct; maximum permissible dose; mean population doubling; membrane potential differe... |
| MTD | maximum tolerated dose; mean total dose; metastatic trophoblastic disease; Midwife Teacher's Diploma... |
| PD | Doctor of Pharmacy; Dublin Pharmacopoeia; interpupillary distance; Paget disease; pancreatic duct; p... |
| radiation cataract | A cataract caused by excessive or prolonged exposure to ultraviolet rays, X-rays, radium, beta rays, gamma rays, heat, or radioactive isotopes. (05 Mar 2000) |
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| radiation chemistry | The science concerned with the effects of ionizing or nuclear radiation on chemical reactions or materials. (05 Mar 2000) |
| radiation chimera | An organism whose body contains cell populations of different genotypes as a result of the injection of foreign cells into it after it has received sufficient ionizing radiation to destroy the mature host cells which would otherwise reject the injected cells. (12 Dec 1998) |
| radiation damage, bulk | <radiobiology> General term describing changes in chemical and/or metallurgical properties of structure components of fusion reactor caused by atomic displacement and nuclear transmutation events occuring as a result of exposure to a radiation environment (such as the neutrons emitted from a fission or D-T fusion reactor). (09 Oct 1997) |
| radiation damage, surface | <radiobiology> General term describing damage to the surface of the containment structure which directly interfaces with the thermonuclear plasma, includes such phenomena as radiation blistering, charged-particle (or neutron) sputtering, and spallation or exfoliation of layers of the surface. (09 Oct 1997) |
| radiation dermatosis | Skin changes at the site of ionizing radiation, particularly erythema in the acute stage, temporary or permanent epilation, and chronic changes in the epidermis and dermis resembling actinic keratosis. (05 Mar 2000) |
| radiation fibrosis | The formation of scar tissue as a result of radiation therapy to the lung. (12 Dec 1998) |
| radiation inactivation | The technique of inactivating proteins in freeze dried (lyophilised) preparations using high energy particles (e.g. Electrons). One high energy particle can apparently inactivate all of the components of a multisubunit polypeptide, the method is therefore used to determine the molecular weight of functional oligomers. (18 Nov 1997) |
| radiation injuries | Harmful effects of non-experimental exposure to ionizing or non-ionizing radiation in chordates. (12 Dec 1998) |
| radiation injuries, experimental | Harmful effects of exposure to ionizing or non-ionizing radiation produced experimentally in chordates. (12 Dec 1998) |
| radiation, ionizing | Electromagnetic or corpuscular radiation capable of producing ions, directly or indirectly, in its passage through matter. The wavelengths are equal to or smaller than those of short (far) ultraviolet radiation and include gamma and X-rays and high-energy elementary particles. (12 Dec 1998) |
| radiation leukaemia virus | A murine leukaemia virus isolated from radiation-induced lymphomas in c57bl mice. It is leukemogenic, thymotrophic, can be transmitted vertically, and replicates only in vivo. (12 Dec 1998) |
| radiation monitoring | The observation, either continuously or at intervals, of the levels of radiation in a given area, generally for the purpose of assuring that they have not exceeded prescribed amounts or, in case of radiation already present in the area, assuring that the levels have returned to those meeting acceptable safety standards. (12 Dec 1998) |
| radiation myelitis | Damage to the spinal cord from exposure to X-rays or other high energy radiation; usually radiation myelitis. Synonym: radiation myelitis. (05 Mar 2000) |
| radiation myelopathy | Damage to the spinal cord from exposure to X-rays or other high energy radiation; usually radiation myelitis. Synonym: radiation myelitis. (05 Mar 2000) |