• synonyms


[fat-sol-yuh-buh l]
adjective Chemistry.
  1. soluble in oils or fats.
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Origin of fat-soluble

First recorded in 1920–25
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for fat-soluble

Historical Examples

  • The fat-soluble vitamine has been termed by some the growth vitamine.

    Scurvy Past and Present

    Alfred Fabian Hess

  • Without milk fat, in whole milk or in butter, we run considerable risk of having too little of the fat-soluble vitamine.

    Food Guide for War Service at Home

    Katharine Blunt, Frances L. Swain, and Florence Powdermaker

  • At least two "determinants" are thought to be concerned in the nutrition of growth, a fat-soluble and a water-soluble substance.

    Food Poisoning

    Edwin Oakes Jordan

  • If the bean is sprouted, a large amount of this fat-soluble vitamine is produced by the plant itself.

  • This appears to contain paraffin, beeswax, a fat-soluble red dye and considerable rosin.

British Dictionary definitions for fat-soluble


  1. soluble in nonpolar substances, such as ether, chloroform, and oils. Fat-soluble compounds are often insoluble in water
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

fat-soluble in Medicine


  1. Soluble in fats or fat solvents.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.