oleïc acid

A form of oleic acid — An unsaturated fatty acid, having 18 carbon atoms and one double bond, found in olive oil and very many other vegetable and animal oils and fats; it is used for making soap, cosmetics etc.

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Meanings

nounoleïc acid (uncountable)
  1. obsoleteuncountableObsolete form of oleic acid.

    The insoluble portion consists essentially of compounds of cholesterine and isocholesterine with oleïc acid, and in lesser amount with solid fatty acids, e.g., stearic acid and hyæna acid.

    1885, J[ohn] J[ames] Hummel, “Wool”, in The Dyeing of Textile Fabrics, London; Paris; New York, N.Y.; Melbourne, Vic.: Cassell & Company, Limited, part “Fibres”, section 35, “Wool-fat”, page 38
    2 more examples

    The oleïc acid separated was again converted into soap by means of potash, and this soap again dissolved in water. An additional portion of margarate of potash precipitated. By repeating this process two or three times, the oleïc acid was obtained in a state of tolerable purity.

    1818, Thomas Thomson, “Of fixed oils”, in A System of Chemistry, in Four Volumes, volume II, Philadelphia, Pa.: […] Abraham Small, […], section VI (Of oleïc acid), page 294

    Doubly linked acids with seventeen carbon-atoms are unknown, but with eighteen we know of oleïc acid and its isomers, elaïdic acid and iso-oleïc acid. Oleïc acid and elaïdic acid have one structure which has been differently interpreted as either one or other of these

    1895, F[rantz] Peckel Möller, Cod-Liver Oil and Chemistry, London: Peter Möller, […], part II (Oxygen Compounds), page 192
Cite this entry
APA

oleïc acid. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/ole%C3%AFc%20acid

MLA

“oleïc acid.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/ole%C3%AFc%20acid. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “oleïc acid,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/ole%C3%AFc%20acid.

Source: oleïc acid on Wiktionary, CC BY-SA 4.0.