hydron

Also contains definitions of: hydride, hydro
https://doi.org/10.1351/goldbook.H02904
The general name for the @C00907@ H+; the species H is the hydride @A00358@ and H is the hydro group. These are general names to be used without regard to the nuclear mass of the hydrogen entity, either for hydrogen in its natural abundance or where it is not desired to distinguish between the @I03331@.
Sources:
PAC, 1988, 60, 1115. (Names for hydrogen atoms, ions, and groups, and for reactions involving them (Recommendations 1988)) on page 1116 [Terms] [Paper]
PAC, 1994, 66, 1077. (Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)) on page 1123 [Terms] [Paper]
Red Book, 3rd ed., p. 103 [Terms] [Book]