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n. - The state of being a compound that exists in forms having different arrangements of atoms but the same molecular weight.

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Usage examples (32)
  • The word isomerism was coined by Berzelius to express this anomalous condition of things, which seemed to negative the most fundamental truths of chemistry.
  • This phenomenon is called isomerism, and the generally accepted explanation is that the atoms in isomeric molecules are differently arranged, or grouped, in space.
  • The phenomenon of isomerism is often regarded as a success for atomism.
  • It was there I got my introduction to optical isomerism and the tetrahedral carbon atom.
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