| Du Bois-Reymond's law | A motor nerve responds, not to the absolute value, but to the alteration of value from moment to moment, of the electric current; i.e., rate of change of intensity of the current is a factor in determining its effectiveness. Synonym: Du Bois-Reymond's law. (05 Mar 2000) |
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| Dulong-Petit law | The specific heats of many solid elements are inversely proportional to their atomic weights. (05 Mar 2000) |
| inverse square law | As applied to point sources, the intensity of radiation diminishes in proportion to the square of the distance from the source. (05 Mar 2000) |
| isodynamic law | For energy purposes, the different foodstuffs may replace one another in accordance with their caloric values when burned in a calorimeter. (05 Mar 2000) |
| Ochoa's law | The content of the X-chromosome tends to be phylogenetically conserved. (05 Mar 2000) |
| ohm's law | <physics> The relationship between the net current and the electric field in a conducting medium. For simple resistors, the voltage equals current times resistance, V = IR. In plasmas the generalised Ohm's Law is a more complex tensor relationship involving the vector current density, the vector for the electric field, and a generalised resistance tensor that relates the two. (09 Oct 1997) |
| Tait's law | An obsolete dictum that an exploratory laparotomy should be performed in every case of obscure pelvic or abdominal disease that threatens health or life. (05 Mar 2000) |
| third law of thermodynamics | <chemistry> The entropy of a perfect crystal at 0 K is zero. (09 Jan 1998) |
| Einthoven's law | In the electrocardiogram the potential of any wave or complex in lead II is equal to the sum of the potentials of leads I and III. Synonym: Einthoven's equation. (05 Mar 2000) |
| Elliott's law | Adrenaline acts upon those structures innervated by sympathetic nerve fibres. (05 Mar 2000) |
| Jackson's law | Loss of mental functions due to disease retraces in reverse order its evolutionary development. (05 Mar 2000) |
| Farr's law | The curve of cases of an epidemic rises rapidly at first, then climbs slowly to a peak from which the fall is steeper than the previous rise. (05 Mar 2000) |
| father-in-law | The father of one's husband or wife; correlative to son-in-law and daughter-in-law. A man who marries a woman having children already, is sometimes, though erroneously, called their father-in-law. Source: Websters Dictionary (01 Mar 1998) |
| zeroeth law of thermodynamics | <chemistry> Two systems in thermal equilibrium with a third are in thermal equilibrium with each other. (09 Jan 1998) |
| Fechner-Weber law | The intensity of a sensation varies by a series of equal increments (arithmetically) as the strength of the stimulus is increased geometrically; if a series of stimuli is applied and so adjusted in strength that each stimulus causes a just perceptible change in intensity of the sensation, then the strength of each stimulus differs from the preceding one by a constant fraction; thus, if a just perceptible change in a visual sensation is produced by the addition of 1 candle to an original illumination of 100 candles, 10 candles will be required to produce any change in sensation when the original illumination was one of 1000 candles. Synonym: Fechner-Weber law, Weber's law. (05 Mar 2000) |