A nuclear stress test is a noninvasive means of detecting the presence and/or signiï¬ cance of coronary. artery disease. Coronary artery disease is a condition in which there is narrowing or blockage of the blood. vessels supplying the heart muscle. This can cause chest pain which is known as angina pectoris.
coefficient. n. 1. (Mathematics) maths. a. a numerical or constant factor in an algebraic term: the coefficient of the term 3xyz is 3. b. the product of all the factors of a term excluding one or more specified variables: the coefficient of x in 3axyz is 3ayz.
Partition coefficient. In the physical sciences, a partition-coefficient (P) or distribution-coefficient (D) is the ratio of concentrations of a compound in a mixture of two immiscible phases at equilibrium. This ratio is therefore a measure of the difference in solubility of the compound in these two phases.