| AR | absolute risk; accounts receivable; achievement ratio; actinic reticuloid [syndrome]; active resista... |
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| MADPA | Medicaid Antidiscriminatory Drug Pricing and Patient Benefit Restoration Act |
| SLIDRC | Student Loan Interest Deduction Restoration Coalition |
| CELSS | Controlled Ecological Life Support System |
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| ROSC | restoration of spontaneous circulation |
| ecological restoration | <ecology> The process of renewing and maintaining ecosystem health. Ecological restoration is the process of intentionally altering a site to establish a defined, indigenous, historic ecosystem. The goal of this process is to emulate the structure, function, diversity, and dynamics of the specified ecosystem. (10 Nov 1998) |
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| ecological chemistry | Chemistry that concentrates on the effects of woman-made chemicals on the environment as well as the development of agents that are not harmful to the environment. The study of the molecular interactions between species and between species and the environment. (05 Mar 2000) |
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| ecological ectocrine | A chemical substance that undergoes biosynthesis in one species and that exerts an effect on the function of another species through mechanisms of the external environment; e.g., the biosynthesis of vitamins by ruminants and their subsequent ingestion by other animals. See: ectohormone. (05 Mar 2000) |
| ecological epidemiology | <epidemiology> A branch of epidemiology which views disease as a result of the ecological interactions between populations of hosts and parasites; what we do. We contrast this with classical epidemiology. (05 Dec 1998) |
| ecological fallacy | The bias that may occur because an association observed between variables at an aggregate level does not necessarily represent an association that exists at an individual level; an error of inference due to failure to distinguish between different levels of organization. (05 Mar 2000) |
| ecological protection | <ecology> Protection consists of measures undertaken to protect and preserve elements of an ecosystem's structure and functions against future degradation. (10 Nov 1998) |
| ecological system | <ecology> An ecosystem is the dynamic and interrelating complex of plant and animal communities and their associated non-living environment. The physical and climactic features and all the living and dead organisms in an area that are interrelated in the transfer of energy and material. An interacting complex of a community and its environment functioning as an ecological unit in nature. Differs from system in being a more rigorous definition that encompasses and requires assumptions of energetics, ecological interactions, species adaptations and so forth. (13 Nov 1997) |
| ecological systems, closed | Systems that provide for the maintenance of life in an isolated living chamber through reutilization of the material available, in particular, by means of a cycle wherein exhaled carbon dioxide, urine, and other waste matter are converted chemically or by photosynthesis into oxygen, water, and food. (12 Dec 1998) |
| acid-etched restoration | The restoration of tooth structure with a resin after the surface of the tooth has been treated with an acid solution that etches the tooth surface, thereby increasing retention of the restoration. (05 Mar 2000) |
| restoration | Measures undertaken to return a degraded ecosystem's functions and values, including its hydrology, plant and animal communities, and/or portions thereof, to a less degraded ecological condition. (09 Oct 1997) |
| restoration measure | <ecology> A restoration measure consists of one or more features or activities, at a geographic site, that is intended to cause a desirable change in an ecological resource and results in a positive environmental output. Many restoration measures are combinations of several features and activities. (10 Mar 1998) |
| permanent restoration | A definitive restoration, in contradistinction to a temporary or provisional restoration. (05 Mar 2000) |
| root canal restoration | A gutta-percha, silver, or plastic cone that has been carried into a root canal, either alone or in conjunction with a cement, paste, or solvent, for the purpose of obturating the canal space. (05 Mar 2000) |
| combination restoration | A tooth restoration of two or more materials applied in layers. (05 Mar 2000) |
| compound restoration | A restoration of more than one surface of a tooth. (05 Mar 2000) |
| plastic restoration material | In dentistry, any material that may be shaped directly to the tooth cavity, such as amalgam, cement, or resin. (05 Mar 2000) |
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