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saponify

American  
[suh-pon-uh-fahy] / səˈpɒn əˌfaɪ /

verb (used with object)

saponified, saponifying
  1. to convert (a fat) into soap by treating with an alkali.

  2. to decompose (any ester), forming the corresponding alcohol and acid or salt.


verb (used without object)

saponified, saponifying
  1. to become converted into soap.

saponify British  
/ səˈpɒnɪˌfaɪ /

verb

  1. to undergo or cause to undergo a process in which a fat is converted into a soap by treatment with alkali

  2. 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

"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

Other Word Forms

Etymology

Origin of saponify

1815–25; < Latin sāpōn- (stem of sāpō ) soap + -ify

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

"This is to saponify the oil," I explained.

From The Water Eater by Marks, Winston K.

But to simplify the operation, he preferred to saponify the fat by means of lime.

From The Mysterious Island by Verne, Jules

When just enough alkali is used to completely saponify the amount of fat, the product is called a neutral, or mild, soap.

From Ontario Teachers' Manuals: Household Management by Ontario. Ministry of Education

It is advisable to saponify a little fat with it.

From The Handbook of Soap Manufacture by Simmons, W. H.

To avoid this, the quantity of alkali required to saponify the myricine is first ascertained, and then that required to saturate the free cerotic acid.

From Scientific American Supplement, No. 443, June 28, 1884 by Various

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