law (law) a uniform or constant fact or principle.
Allen's paradoxic law the more sugar a normal person is given the more is utilized; the reverse is true in diabetics.
all-or-none law see all or none.
Beer's law , Beer-Lambert law in spectrophotometry, the absorbance of a solution is proportional to the concentration of the absorbing solute and to the path length of the light beam through the solution.
Boyle's law at a constant temperature the volume of a perfect gas varies inversely as the pressure, and the pressure varies inversely as the volume.
Charles' law at a constant pressure the volume of a given mass of a perfect gas varies directly with the absolute temperature.
law of conservation of energy in any given system the amount of energy is constant; energy is neither created nor destroyed, but only transformed from one form to another.
law of conservation of mass , law of conservation of matter mass (or matter) can be neither created nor destroyed; this law can be violated on the microscopic level.
Dalton's law the pressure exerted by a mixture of nonreacting gases is equal to the sum of the partial pressures of the separate components; it holds true only at very low pressures.
Hellin's law , Hellin-Zeleny law one in about 89 pregnancies ends in the birth of twins; one in 89 × 89 (7921), of triplets; one in 89 × 89 × 89 (704,969), of quadruplets.
Henry's law the solubility of a gas in a liquid solution at a constant temperature is proportional to the partial pressure of the gas above the solution.
law of independent assortment genes that are not alleles are distributed to the gametes independently of one another; one of Mendel's laws.
Mendel's laws , mendelian laws two laws of inheritance of single-gene traits that form the basis of genetics; the law of segregation and the law of independent assortment.
Nysten's law rigor mortis affects first the muscles of mastication, next those of the face and neck, then those of the trunk and arms, and last those of the legs and feet.
Ohm's law the strength of an electric current varies directly as the electromotive force and inversely as the resistance.
Raoult's law the vapor pressure of a volatile component of an ideal solution is equal to the mole fraction of that substance in solution times its vapor pressure in the pure state at the temperature of the solution; it is true only for ideal solutions and ideal gases.
law of segregation the members of a pair of allelic genes segregate from one another and pass to different gametes; one of Mendel's laws.
law of similars in homeopathy, the principle that a substance that in large doses will produce symptoms of a specific disease will, in extremely small doses, cure it.
laws of thermodynamics Zeroth law: two systems in thermal equilibrium with a third are in thermal equilibrium with each other. First law: energy is conserved in any process. Second law: there is always an increase in entropy in any naturally occurring (spontaneous) process. Third law: absolute zero is unattainable.
Nys·ten's law (n -st  z )n. The principle that rigor mortis first affects the muscles of the head and then spreads toward the hands and feet. |
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