|1.||stereoisomerism See also optical isomerism the existence of two or more compounds having the same molecular formula but a different arrangement of atoms within the molecule|
|2.||the existence of two or more nuclides having the same atomic numbers and mass numbers but different energy states|
isomerism i·som·er·ism (ī-sŏm'ə-rĭz'əm)
The phenomenon of the existence of isomers.
The complex of chemical and physical phenomena characteristic of or attributable to isomers.
The state or condition of being an isomer.