A term used to represent replacement of protium by deuterium. The use of the word deuteration is also acceptable.
Sources:
PAC, 1988, 60, 1115. 'Names for hydrogen atoms, ions, and groups, and for reactions involving them (Recommendations 1988)' on page 1115 (https://doi.org/10.1351/pac198860071115)
PAC, 1991, 63, 1541. 'Recommendations for nomenclature and symbolism for mass spectroscopy (including an appendix of terms used in vacuum technology). (Recommendations 1991)' on page 1556 (https://doi.org/10.1351/pac199163101541)