noun Date: 1838 the relationship of two or more chemical species that are isomers, the relation of two or more nuclides with the same mass numbers and atomic numbers but different energy states and rates of radioactive decay
ISOMERISM
Meaning of ISOMERISM in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012