olestra

US:USA pronunciation: respellingUSA pronunciation: respelling(ō les′trə)


WordReference Random House Unabridged Dictionary of American English © 2026
o•les•tra  (ō les′trə),USA pronunciation n. 
  1. a synthetic oil used as a substitute for dietary fat: not digested or absorbed by the human body.
  • Latin oleum oil) + -estra, alteration of (poly)ester
  • ol- (1995

o•les•tra  (ō les′trə),USA pronunciation n. 
  1. a synthetic oil used as a substitute for dietary fat: not digested or absorbed by the human body.
  • Latin oleum oil) + -estra, alteration of (poly)ester
  • ol- (1990–95

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