| law of the heart | 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) |
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| law of the minimum | Growth and development of plants and animals are determined by the availability of that essential nutrient which is present in the smallest amount. (05 Mar 2000) |
| Le Chatelier's law | If external factors such as temperature and pressure disturb a system in equilibrium, adjustment occurs in such a way that the effect of the disturbing factors is reduced to a minimum. Synonym: Le Chatelier's principle. (05 Mar 2000) |
| Listing's law | When the eye leaves one object and fixes upon another, it revolves about an axis perpendicular to a plane cutting both the former and the present lines of vision. (05 Mar 2000) |
| Louis' law | Tuberculosis in any organ is associated with tuberculosis in the lung. (05 Mar 2000) |