| neutroclusion | A malocclusion in which there is a normal anteroposterior relationship between the maxilla and mandible; in Angle's classification, a Class I malocclusion. Synonym: neutral occlusion. Origin: neutro-+ occlusion (05 Mar 2000) |
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| neutron | <physics> An elementary atomic particle that has no charge and a mass that is approximately the same as that of a proton. Neutrons are found in allatoms except the lightest isotopes of hydrogen. (09 Jan 1998) |
| neutron activation analysis | Activation analysis in which the specimen is bombarded with neutrons. Identification is made by measuring the resulting radioisotopes. (12 Dec 1998) |
| neutron capture therapy | A technique for the treatment of neoplasms in which an isotope is introduced into target cells followed by irradiation with thermal neutrons. (12 Dec 1998) |
| neutron radiation | An emission of neutrons from the nucleus of an atom by decay or fission. (05 Mar 2000) |
| neutrons | Electrically neutral elementary particles found in all atomic nuclei except light hydrogen; the mass is equal to that of the proton and electron combined and they are unstable when isolated from the nucleus, undergoing beta decay. Slow, thermal, epithermal, and fast neutrons refer to the energy levels with which the neutrons are ejected from heavier nuclei during their decay. (12 Dec 1998) |
| neutropenia | <haematology> Leucopenia in which the decrease in white blood cells is chiefly in neutrophils. (18 Nov 1997) |
| neutropenic angina | <haematology> A symptom complex characterised by marked decrease in the number of granulocytes and by lesions of the throat and other mucous membranes, of the gastrointestinal tract and of the skin, also called granulocytopenia and Schultz's disease. (18 Nov 1997) |
| neutrophil | <haematology> A granulocyte, a white blood cell. (18 Nov 1997) |
| neutrophil activating factor | <cytokine> A cytokine that activates neutrophils and attracts neutrophils and T-lymphocytes. It is released by several cell types including monocytes, macrophages, T-lymphocytes, fibroblasts, endothelial cells, and keratinocytes by an inflammatory stimulus. Il-8 is a member of the beta-thromboglobulin superfamily and structurally related to platelet factor 4. Acronym: IL-8 (12 Dec 1998) |
| neutrophil activating protein | <cytokine> A cytokine that activates neutrophils and attracts neutrophils and T-lymphocytes. It is released by several cell types including monocytes, macrophages, T-lymphocytes, fibroblasts, endothelial cells, and keratinocytes by an inflammatory stimulus. Il-8 is a member of the beta-thromboglobulin superfamily and structurally related to platelet factor 4. Acronym: IL-8 (12 Dec 1998) |
| neutrophil activation | The process in which the neutrophil is stimulated by diverse substances, resulting in degranulation and/or generation of reactive oxygen products, and culminating in the destruction of invading pathogens. The stimulatory substances, including opsonised particles, immune complexes, and chemotactic factors, bind to specific cell-surface receptors on the neutrophil. (12 Dec 1998) |
| neutrophil chemotactant factor | <cytokine> A cytokine that activates neutrophils and attracts neutrophils and T-lymphocytes. It is released by several cell types including monocytes, macrophages, T-lymphocytes, fibroblasts, endothelial cells, and keratinocytes by an inflammatory stimulus. Il-8 is a member of the beta-thromboglobulin superfamily and structurally related to platelet factor 4. Acronym: IL-8 (12 Dec 1998) |
| neutrophil collagenase | <enzyme> Cleaves interstitial collagens in the triple helical domain; cleaves type I collagen more rapidly than type III; fibroblast collagenase cleaves at the same site as neutrophil colagenase Registry number: EC 3.4.24.34 Synonym: matrix metalloproteinase 8, mmp-8, mmp 8, fibroblast collagenase (26 Jun 1999) |
| neutrophil granule | A granule stainable with the neutral component of stains, e.g., the Romanovsky-type blood stains. (05 Mar 2000) |