- to convert (a fat) into soap by treating with an alkali.
- to decompose (any ester), forming the corresponding alcohol and acid or salt.
- to become converted into soap.
Origin of saponify
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for unsaponified
Run the gasoline into a weighed dish, evaporate the alcohol, dry and weigh the residue as unsaponified matter.Soap-Making Manual
E. G. Thomssen
The unsaponified fat of the coccus insect, as well as oleic and margaric acids.
- to undergo or cause to undergo a process in which a fat is converted into a soap by treatment with alkali
- to undergo or cause to undergo a reaction in which an ester is hydrolysed to an acid and an alcohol as a result of treatment with an alkali
C19: from French saponifier, from Latin sāpō soap
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
Word Origin and History for unsaponified
1821, from French saponifier (see saponification). Related: Saponified; saponifying.
Online Etymology Dictionary, © 2010 Douglas Harper
- To undergo saponification.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.