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Definition of Chemical shift
1. Noun. (chemistry physics) the change in the nuclear magnetic resonance frequency of a nucleus depending on its electronic environment; used in NMR spectroscopy to determine the structure of molecules ¹
¹ Source: wiktionary.com
Medical Definition of Chemical shift
1. Dependence of the resonance frequency of a nucleus on the chemical binding of the atom or molecule in which it is contained. See: chemical shift artifact. (05 Mar 2000)