- Chemistry. the relation of two or more compounds, radicals, or ions that are composed of the same kinds and numbers of atoms but differ from each other in structural arrangement (structural isomerism), as CH3OCH3 and CH3CH2OH, or in the arrangement of their atoms in space and therefore in one or more properties.Compare optical isomerism, stereoisomerism.
- Also called nuclear isomerism. Physics. the relation of two or more nuclides that have the same atomic number and mass number but different energy levels and half-lives.
- Chemistry, Physics. the phenomenon characterized by such a relation.
- the state or condition of being isomerous.
Origin of isomerism
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Examples from the Web for isomerism
One of the most remarkable phenomena of chemistry is that of isomerism.
Among organisms we sometimes observe a phenomenon which looks very like isomerism.
A rough illustration of the phenomenon of isomerism is furnished by written language.
A further distinction is necessary to a survey of the subdivisions of isomerism regarded in its widest sense.
Before entering into detail it may be useful to consider the nature of isomerism from a general standpoint.
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
- 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.
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