We found one dictionary that defines the word positional isomers:

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1. positional isomers: Wiktionary

▸ Words similar to positional isomers ▸ Usage examples for positional isomers ▸ Idioms related to positional isomers ▸ Wikipedia articles (New!) ▸ Words that often appear near positional isomers ▸ Rhymes of positional isomers ▸ Invented words related to positional isomers