One of the mysteries of the English language finally explained.
A liquid aldehyde with a fruity odour, obtained by distilling castor oil and used in perfumery; 1-heptanal, CH₃(CH₂)₅CHO.
Mid 19th century; earliest use found in William Gregory (1803–1858), chemist and psychic investigator. From French oenantol from oenant- (in oenantilique) + -ol. With forms in -ole compare -ole.
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