nuclear magnetic resonance spectrum three-dimensional nuclear magnetic resonance spectrum 3D-NMR spectrum 3D-NMR spectra 2009-06-05T02:50:36Z https://orcid.org/0000-0001-5985-7429 A three-dimensional plot of chemical shift vs. intensity for spin-active nuclei obtained by measuring the effect of the absorption of radio frequency radiation on nuclear spin-state transitions in the presence of a magnetic field. Signals are defined in terms of three frequencies; by the chemical shift of a particular nucleus in one dimension and, in the other two, by the chemical shifts of correlated nuclei. 3D NMR spectrum 3D NMR spectra CHMO:0001929