[ uhn-sach-uh-rey-tid ]
/ ʌnˈsætʃ əˌreɪ tɪd /


not saturated; having the power to dissolve still more of a substance.
Chemistry. (of an organic compound) having a double or triple bond and capable of taking on elements or groups by direct chemical combination without the liberation of other elements or compounds, as ethylene, CH2=CH2; undersaturated.



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Origin of unsaturated

First recorded in 1750–60; un-1 + saturated

OTHER WORDS FROM unsaturated

un·sat·u·rate [uhn-sach-er-it, -uh-reyt], /ʌnˈsætʃ ər ɪt, -əˌreɪt/, nounun·sat·u·ra·tion, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for unsaturated

British Dictionary definitions for unsaturated

/ (ʌnˈsætʃəˌreɪtɪd) /


not saturated
(of a chemical compound, esp an organic compound) containing one or more double or triple bonds and thus capable of undergoing addition reactions
(of a fat, esp a vegetable fat) containing a high proportion of fatty acids having double bonds
(of a solution) containing less solute than a saturated solution

Derived forms of unsaturated

unsaturation, noun
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

Medical definitions for unsaturated

[ ŭn-săchə-rā′tĭd ]


Of or relating to a solution in which the solvent is capable of dissolving still more of the solute; not saturated.
Of or relating to a chemical compound in which all the affinities are not satisfied, so that still other atoms or radicals may be added to it.
Of or relating to chemical compounds containing double and triple bonds.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Scientific definitions for unsaturated

[ ŭn-săchə-rā′tĭd ]

Relating to an organic compound in which two or more of the carbon atoms are joined by a double or triple bond and therefore can be combined with additional atoms or radicals. Benzene and acetylene are examples of unsaturated compounds. Compare saturated See also monounsaturated polyunsaturated.
Relating to a solution that is capable of dissolving more solute than it already contains.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.