product (prod´ukt)

1. Anything produced or made, either naturally or artificially. 2. In mathematics, the result of multiplication. [L. productus, fr. pro-duco, pp. -ductus, to lead forth]
cleavage p. a substance resulting from the splitting of a molecule into two or more simpler molecules.
double p. the p. of systolic blood pressure multiplied by the heart frequency; a measure of heart work load. See Robinson index.
end p. the final p. in a metabolic pathway.
fibrin/fibrinogen degradation p.'s (FDP) several poorly characterized small peptides, designated X, Y, D, and E, that result following the action of plasmin on fibrinogen and fibrin in the fibrinolytic process.
fission p. an atomic species produced in the course of the fission of a larger atom such as 235U.
natural p.'s naturally occurring compounds that are end p.'s of secondary metabolism; often, they are unique compounds for particular organisms or classes of organisms.
orphan p.'s drugs, biologicals, and medical devices (including diagnostic in vitro tests) that may be useful in common or rare diseases but which are not considered commercially viable.orphan drugs;
spallation p. an atomic species produced in the course of the spallation of any atom.
substitution p. a p. obtained by replacing one atom or group in a molecule with another atom or group.


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