One of the mysteries of the English language finally explained.
A yellowish-green crystalline ketone, isomeric with camphorone, obtained by a condensation reaction of acetone; 2,6-dimethyl-2,5-heptadien-4-one, (CH₃)₂C=CHCOCH=C(CH₃)₂.
Mid 19th century (in an earlier sense). From French phorone from -phor- (in post-classical Latin camphora) + French -one).
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