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Definition of isomer noun from the Oxford Advanced Learner's Dictionary

isomer

noun
 
/ˈaɪsəmə(r)/
 
/ˈaɪsəmər/
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  1. (chemistry) one of two or more compounds that have the same atoms, but in different arrangements
  2. (physics) one of two or more nuclei that have the same atomic number, but different energy states
    3. Word Originmid 19th cent.: from Greek isomerēs ‘sharing equally’, from isos ‘equal’ + meros ‘a share’.
See isomer in the Oxford Advanced American Dictionary
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trait
noun
 
 
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