| ANA | acetylneuraminic acid; American Narcolepsy Association; American Neurological Association; American ... |
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| ASHA | American School Health Association; American Social Health Association; American Speech and Hearing ... |
| AES | acetone-extracted serum; American Electroencephalographic Society; American Encephalographic Society... |
| ACCP | American College of Chest Physicians; American College of Clinical Pharmacology; American College of... |
| IPA | immunoperoxidase assay; incontinentia pigmenti achromians; independent physician or practice associa... |
| association | 1. <neurology> Correlation involving a high degree of modifiability and also consciousness. 2. <genetics> The occurrence together of two or more phenotypic characteristics more often than would be expected by change. To be distinguished from linkage. 3. In dysmorphology, the nonrandom occurrence in two or more individuals of multiple anomalies not known to be a polytopic field defect, sequence or syndrome. Origin: L. Associatio (18 Nov 1997) |
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| association areas | Generic term denoting the large expanses of the cerebral cortex that are not sensory or motor in the customary sense, but are involved in advanced stages of sensory information processing, multisensory integration, or sensorimotor integration. See: cerebral cortex. Synonym: association areas. (05 Mar 2000) |
| association constant | <chemistry> Reciprocal of dissociation constant. A measure of the extent of a reversible association between two molecular species at equilibrium. (18 Nov 1997) |
| association cortex | Generic term denoting the large expanses of the cerebral cortex that are not sensory or motor in the customary sense, but are involved in advanced stages of sensory information processing, multisensory integration, or sensorimotor integration. See: cerebral cortex. Synonym: association areas. (05 Mar 2000) |
| association fibres | Nerve fibre's interconnecting subdivisions of the cerebral cortex of the same hemisphere or different segments of the spinal cord on the same side. Synonym: endogenous fibres, intrinsic fibres. (05 Mar 2000) |
| association learning | The principle that items experienced together enter into a connection, so that one tends to reinstate the other. (12 Dec 1998) |
| association mechanism | The cerebral mechanism whereby the memory of past sensations may be compared or associated with present ones. (05 Mar 2000) |
| association neurosis | A neurosis in which association of ideas causes mental repetition of an experience. (05 Mar 2000) |
| association system | Groups or tracts of nerve fibres interconnecting different regions of one and the same major subdivision of the central nervous system, such as the various areas of the cerebral cortex or the various segments of the spinal cord. (05 Mar 2000) |
| association test | A word (stimulus word) is spoken to the subject, who is to reply immediately with another word (reaction word) suggested by the first; used as a diagnostic aid in psychiatry and psychology, clues being given by the length of time (association time) between the stimulus and reaction words, and also by the nature of the reaction words. (05 Mar 2000) |
| association time | Time elasping between a stimulus and the verbalised response to it. (05 Mar 2000) |
| association tract | See: association system. (05 Mar 2000) |
| genetic association | The occurrence together in a population, more often than can be readily explained by chance, of two or more traits of which at least one is known to be genetic. (05 Mar 2000) |
| clang association | Psychic association's resulting from sounds; often encountered in the manic phase of manic-depressive psychosis. (05 Mar 2000) |
| 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) |