ester

[es-ter]
noun Chemistry.
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:
1850–55; coined by L. Gmelin (1788–1853), German chemist

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World English Dictionary
ester (ˈɛstə)
 
n
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
 
[C19: from German, probably a contraction of Essigäther acetic ether, from Essig vinegar (ultimately from Latin acētum) + Ätherether]

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Etymonline
Word Origin & History

ester
coined in Ger. 1848, probably a contraction of essigäther, from essig "vinegar" + äther "ether."
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

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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American Heritage
Science Dictionary
ester   (ěs'tər)  Pronunciation Key 
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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Example sentences
Any vegetable oil can become fuel, but not until its fatty acids are converted to chemical compounds known as esters.
We should all hold judgement until someone performs the task of trying and detect nucleotide arsenate esters.
Jojoba oil has unique array of liquid wax esters are almost identical to those of our own skin.
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