One of the mysteries of the English language finally explained.
An oily liquid obtained on elimination of a water molecule from α- or β-ionone.
Any of a class of polymers in which ionized groups are part of the main chain.
Late 19th century; earliest use found in Journal of the Chemical Society. From German Ionen from ancient Greek ἴον violet + German -en<br>1960s. From ion + -ene.
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