Look up isotopocule in Wiktionary, the free dictionary.
Isotopocule is a shorthand for an isotopically substituted
molecule. Isotopocules are molecules that differ only in their isotopic composition or the intramolecular position of the isotopes.[1] It is an
umbrella term for the more specific terms
isotopologue and
isotopomer, coined by Jan Kaiser and Thomas Röckmann in 2008.[2][3]