rule (rldbomacl) a statement of conditions commonly observed in a given situation, or of a prescribed procedure to obtain a given result.
rule of nines, 
rule of nines
Durham rule a definition of criminal responsibility from a federal appeals court case, Durham vs. United States, holding that “an accused is not criminally responsible if his unlawful act was the product of mental disease or mental defect.” In 1972 the same court reversed itself and adopted the American Law Institute Formulation.
M'Naghten rule a definition of criminal responsibility formulated in 1843 by English judges questioned by the House of Lords as a result of the acquittal of Daniel M'Naghten on grounds of insanity. It holds that “to establish a defense on the ground of insanity, it must be clearly proved that at the time of committing the act the party accused was laboring under such a defect of reason from disease of the mind as not to know the nature and quality of the act he was doing, or, if he did know it, that he did not know that what he was doing was wrong.”
Nägele's rule (for predicting day of labor) subtract three months from the first day of the last menstruation and add seven days.
rule of nines a method of estimating the extent of body surface that has been burned in an adult, dividing the body into sections of 9 per cent or multiples of 9 per cent. 
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Rule of nines.
van't Hoff's rule the velocity of chemical reactions is increased twofold or more for each rise of 10°C in temperature; generally true only when temperatures approximate those normal for the reaction.
rule of nines,
a formula for estimating the percentage of adult body surface covered by burns by assigning 9% to the head and each arm, twice 9% (18%) to each leg and the anterior and posterior trunk, and 1% to the perineum. This is modified in infants and children because of the proportionately larger head size.
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Rule of nines
rule of nines
Critical care A method for rapidly assessing the extent of burns on the skin surface, which determines the amount of fluid required as replacement therapy; the head and arms each represent 9% of skin surface; anterior or
posterior surface of legs represent 9% each; anterior and posterior truncal skin represent 18% each; inguinal area 1%
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