| HIPC | health insurance purchasing collective; health insurance purchasing cooperative |
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| HIS | health information system; Health Interview Survey; histatin; histidine; hospital information system... |
| HRA | health record analyst; health risk appraisal; heart rate audiometry; hereditary renal adysplasia; hi... |
| HSA | Hazardous Substances Act; Health Services Administration; health systems agency; hereditary siderobl... |
| HSMHA | Health Services and Mental Health Administration |
| Sherrington's law | Every dorsal spinal nerve root supplies a particular area of the skin, the dermatome, which is, however, invaded above and below by fibres from the adjacent spinal segments. (05 Mar 2000) |
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| Snell's law | For two given media, the sine of the angle of incidence bears a constant relation to the sine of the angle of refraction. Synonym: Descartes' law, Snell's law. (05 Mar 2000) |
| Spallanzani's law | The younger the individual the greater is the regenerative power of its cells. (05 Mar 2000) |
| Nasse's law | An early statement of the pattern of X-linked recessive inheritance: haemophilia affects only boys but is transmitted through mothers and sisters. (05 Mar 2000) |
| Starling's law | The energy liberated by the heart when it contracts is a function of the length of its muscle fibres at the end of diastole. Synonym: Starling's law. (05 Mar 2000) |
| Stokes' law | A muscle lying above an inflamed mucous or serous membrane is frequently the seat of paralysis, a relationship of the rate of fall of a small sphere in a viscous fluid; applicable to centrifugation of macromolecules, the wavelength of light emitted by a fluorescent material is longer than that of the radiation used to excite the fluorescence. (05 Mar 2000) |
| Neumann's law | In compounds of analogous chemical constitution, the molecular heat, or the product of the specific heat by the atomic weight, is always the same. (05 Mar 2000) |
| Newton's law | The attractive force between any two bodies is proportional to the product of their masses, and inversely proportional to the square of the distance between their centres. Synonym: law of gravitation. (05 Mar 2000) |
| Dale-Feldberg law | An identical chemical transmitter is liberated at all the functional terminals of a single neuron. (05 Mar 2000) |
| Dalton-Henry law | In dissolving a mixture of gases, a liquid will absorb as much of each gas in the mixture as if that were the only gas dissolved. (05 Mar 2000) |
| Dalton's law | Each gas in a mixture of gases exerts a pressure proportionate to the percentage of the gas and independent of the presence of the other gases present. Synonym: law of partial pressures. (05 Mar 2000) |
| Nysten's law | Rigor mortis affects first the muscles of the head and spreads toward the feet. (05 Mar 2000) |
| Descartes' law | For two given media, the sine of the angle of incidence bears a constant relation to the sine of the angle of refraction. Synonym: Descartes' law, Snell's law. (05 Mar 2000) |
| Donders' law | The rotation of the eyeball is determined by the distance of the object from the median plane and the line of the horizon. (05 Mar 2000) |
| Draper's law | A chemical change is produced in a photochemical substance only by those light rays that are absorbed by that substance. (05 Mar 2000) |