from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A calorie-free fat substitute synthesized from sucrose and vegetable oil for use in snacks such as potato chips, and capable of passing through the body without being digested.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A fat substitute (a glyceride of sucrose) that cannot be easily digested and therefore adds no fat, calories, or cholesterol to food products; also used as an industrial lubricant.


ol(eo)- + alteration of (poly)ester.
(American Heritage® Dictionary of the English Language, Fourth Edition)



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