Plural of cymene; multiple isomeric forms of the hydrocarbon cymene found in various aromatic plant oils.
Cymene (hydrocarbon) + -s (plural marker). Cymenes exist as multiple isomeric versions (p-cymene, o-cymene, m-cymene) differing in molecular structure.
Chemistry uses 'isomers' to describe molecules with identical atoms arranged differently—like having the same Lego bricks but building different structures, which is why p-cymene and o-cymene are technically different molecules!
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