isomer
MOLECULE WITH IDENTICAL ATOMIC COMPOSITION AS ANOTHER, BUT WITH DIFFERENT STRUCTURES OR ORIENTATIONS
Isomers; Isomeric; Isomerism; Molecular isomerism; Chemical isomer; Isomerizing; Isomerized
['??s?m?]
¦ noun
1. Chemistry each of two or more compounds with the same formula but a different arrangement of atoms in the molecule and different properties.
2. Physics each of two or more atomic nuclei with the same atomic number and mass number but different energy states.
Derivatives
isomeric adjective
isomerism noun
isomerize or isomerise verb
Origin
C19: from Gk isomeres 'sharing equally', from isos 'equal' + meros 'a share'.