| AHA | acetohydroxamic acid; acquired hemolytic anemia; acute hemolytic anemia; American Heart Association;... |
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| COA | Canadian Ophthalmological Association; Canadian Orthopaedic Association; certificate of authority; c... |
| DHA | dehydroacetic acid; dehydroascorbic acid; dehydroepiandrosterone; dihydroacetic acid; dihydroxyaceto... |
| RHA | Regional Health Authority; right hepatic artery |
| UKAEA | United Kingdom Atomic Energy Authority |
| Fick's laws of diffusion | The direction of movement of solutes by diffusion is always from a higher to a lower concentration and the diffusive flux JA of solute A across a plane at x is proportional to the concentration gradient of A at x; i.e., JA = -D(CA/x), the increase of concentration of solute A with time, CA/t, is directly proportional to the change in the concentration gradient, i.e., CA/t = D(fl2/x2). (05 Mar 2000) |
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| 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) |