| AMA | against medical advice; alkaline membrane assay; American Management Association; American Medical A... |
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| ANA | acetylneuraminic acid; American Narcolepsy Association; American Neurological Association; American ... |
| ASHA | American School Health Association; American Social Health Association; American Speech and Hearing ... |
| NHA | National Health Association; National Hearing Association; National Hemophilia Association; nonspeci... |
| rCBF | regional Cerebral Blood Flow |
| plant association | A grouping of plant species, or a plant community, that recurs across the landscape. Plant associations are used as indicators of environmental conditions such as temperature, moisture, light, etc. (05 Dec 1998) |
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| word association tests | Lists of words to which individuals are asked to respond ascertaining the conceptual meaning held by the individual. (12 Dec 1998) |
| New York Heart Association classification | A functional classification to assess cardiovascular disability. Class I: patients with cardiac disease without limitation of physical activity. Ordinary activity does not cause symptoms. Class II: patients with cardiac disease with slight limitation of activity; comfortable at rest. Ordinary physical activity results in fatigue, palpitation, dyspnea or angina. Class III: patients with cardiac disease producing marked limitation of activity: comfortable at rest. Less than ordinary physical activity causes symptoms. Class IV: patients with cardiac disease resulting in inability to carry on any physical activity without discomfort. Symptoms may be present even at rest. (05 Mar 2000) |
| free association | Spontaneous verbalization of whatever comes to mind. (12 Dec 1998) |
| laws of association | Principles formulated by Aristotle to account for the functional relationships between ideas; the law of contiguity (association) proved most useful to experimental psychologists, culminating in modern studies of respondent conditioning. (05 Mar 2000) |
| loosening of association | A manifestation of a severe thought disorder characterised by the lack of an obvious connection between one thought or phrase and the next, or with the response to a question. (05 Mar 2000) |