| IS | ileal segment; immediate sensitivity; immune serum; immunosuppression; impingement syndrome; incenti... |
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| ISC | immunoglobulin-secreting cells; insoluble collagen; International Society of Cardiology; Internation... |
| ISW | interstitial water |
| IT | immunological test; immunotherapy; implantation test; individual therapy; information technology; in... |
| ITE | insufficient therapeutic effect; in the ear [hearing aid]; in-training examination; intrapulmonary i... |
| lower body negative pressure | External decompression applied to the lower body. It is used to study orthostatic intolerance and the effects of gravitation and acceleration, to produce simulated haemorrhage in physiologic research, to assess cardiovascular function, and to reduce abdominal stress during childbirth. (12 Dec 1998) |
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| low-pressure | Having, employing, or exerting, a low degree of pressure. Low-pressure steam engine, a steam engine in which low steam is used; often applied to a condensing engine even when steam at high pressure is used. See Steam engine. Source: Websters Dictionary (01 Mar 1998) |