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ester

[es-ter] /ˈɛs tər/
noun, Chemistry
1.
a compound produced by the reaction between an acid and an alcohol with the elimination of a molecule of water, as ethyl acetate, C 4 H 8 O 2 , or dimethyl sulfate, C 2 H 6 SO 4 .
Origin
1850-1855
1850-55; coined by L. Gmelin (1788-1853), German chemist
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for ester
  • Ethyl acetate is an ester that is found naturally in fruits and vegetables such as bananas, apples and coffee.
  • Use the base surfactant which is an ester of a natural fatty acid derived from plants and trees.
  • Ethanol already present in his brew then reacts with the lactic acid to form the lactate ester.
  • It is a triglyceride, an ester derived from glycerol and three fatty acid groups.
British Dictionary definitions for ester

ester

/ˈɛstə/
noun
1.
(chem) any of a class of compounds produced by reaction between acids and alcohols with the elimination of water. Esters with low molecular weights, such as ethyl acetate, are usually volatile fragrant liquids; fats are solid esters
Word Origin
C19: from German, probably a contraction of Essigäther acetic ether, from Essig vinegar (ultimately from Latin acētum) + Ätherether
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
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Word Origin and History for ester
n.

compound formed by an acid joined to an alcohol, 1852, coined in German in 1848 by German chemist Leoipold Gmelin (1788-1853), professor at Heidelberg. "[A]pparently a pure invention" [Flood], perhaps a contraction of or abstraction from Essigäther, the German name for ethyl acetate, from Essig "vinegar" + Äther "ether" (see ether).

Essig is from Old High German ezzih, from a metathesis of Latin acetum (see vinegar).

Online Etymology Dictionary, © 2010 Douglas Harper
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ester in Medicine

ester es·ter (ěs'tər)
n.
Any of a class of organic compounds corresponding to the inorganic salts and formed from an organic acid and an alcohol, usually with the elimination of water.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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ester in Science
ester
  (ěs'tər)   
An organic compound formed when an acid and an alcohol combine and release water. Esters formed from carboxylic acids are the most common, and have the general formula RCOOR', where R and R' are organic radicals. Esters formed from simple hydrocarbon groups are colorless, volatile liquids with pleasant aromas and create the fragrances and flavors of many flowers and fruits. They are also used as food flavorings. Larger esters, formed from long-chain carboxylic acids, commonly occur as animal and vegetable fats, oils, and waxes. Esters have a wide range of uses in industry.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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