| SMAS | submuscular aponeurotic system; superficial musculo-aponeurotic system; superior mesenteric artery s... |
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| CVS | 1) Cardio-Vascular System; 심장 혈관계 2) Chronic Villi Sampling; 융모막 채취... |
| DNS | Domain Name System |
| IHS | 1) International Headache Society 2) Intelligent Hospital System |
| ISS | International Staging System |
| imhoff treatment system | In waste water treatment, a tank without aeration or oxygenation where solids settle out. The solids are digested in a separate compartment in the bottom. (05 Dec 1998) |
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| immune system | <immunology> The body system, made up of many organs and cells, that defends the body against infection, disease and foreign substances. The immune system is often stimulated in specific ways to fight cancer cells. (16 Dec 1997) |
| indicator system | In in vitro immunological tests, a combination of reagents used to determine the degree to which immunological reagents have combined (e.g., sensitised erythrocytes in complement-fixation tests; enzyme and substrate in enzyme-linked immunosorbent assays). (05 Mar 2000) |
| information system | Combination of vital and health statistical data from multiple sources, used to derive information and make decisions about the health needs, health resources, costs, use, and outcome of health care. (05 Mar 2000) |
| integumentary system | The skin, hair, and nails; derived from ectoderm and subjacent mesoderm. (05 Mar 2000) |
| intermediary system | One of the lamellae of partially resorbed osteons occurring between newer, complete osteons. Synonym: ground lamella, intermediary system, intermediate lamella. (05 Mar 2000) |
| international system of units | A system of physical units in which the fundamental quantities are length, time, mass, electric current, temperature, luminous intensity, and amount of substance, and the corresponding units are the meter, second, kilogram, ampere, kelvin, candela, and mole. The system has been given official status and recommended for universal use by the general conference on weights and measures. (12 Dec 1998) |
| interofective system | Term applied by W. Cannon to the autonomic nervous system as opposed to the somatic nervous system or exterofective system. (05 Mar 2000) |
| isolated system | <chemistry> A system which can exchange neither mass nor energy with its surroundings. (09 Jan 1998) |
| occlusal system | The form or design and arrangement of the occlusal and incisal units of a dentition or the teeth on a denture. Synonym: occlusal scheme. (05 Mar 2000) |
| oculomotor system | That part of the central nervous system having to do with eye movements; it is composed of pathways connecting various regions of the cerebrum, brainstem, and ocular nuclei, utilizing multisynaptic articulations. (05 Mar 2000) |
| open system | A system that exchanges energy and materials with the outside environment. (09 Oct 1997) |
| O-R system | <abbreviation> Oxidation-reduction system. (05 Mar 2000) |
| osseous part of skeletal system | The part of the skeleton composed of bone. Synonym: pars ossea systematis skeletalis. (05 Mar 2000) |
| oxidation-reduction system | <enzyme> An enzyme system in the tissues by which oxidation and reduction proceed simultaneously through the transference of hydrogen or of one or more electrons from one metabolite to another. See: oxidation-reduction. Synonym: redox system. (05 Mar 2000) |