https://doi.org/10.1351/goldbook.D01648
A specific name for the atom 2H. The cation 2H+ is a deuteron the species 2H is a deuteride anion and 2H is the deuterio group.
Source:
PAC, 1988, 60, 1115. (Names for hydrogen atoms, ions, and groups, and for reactions involving them (Recommendations 1988)) on page 1116 [Terms] [Paper]