Definition of "isomers" [isomers]

• Plural form of isomer. (noun)

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• "Substances which have precisely the same chemical formulæ (called isomers) have properties as widely apart as alcohol and ether."
• "Both of the following have four carbon atoms and ten hydrogen atoms they are called isomers"
• "These and similar substances, called "isomers," led chemists to suspect that substances are defined not simply by the number and kind of atoms in the molecule but also by the arrangement of those atoms."