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The Collaborative International Dictionary

Ester \Es"ter\, n. [A word invented by L. Gmelin, a German chemist.] (Chem.) An ethereal salt, or compound ether, consisting of an organic radical united with the residue of any oxygen acid, organic or inorganic; thus the natural fats are esters of glycerin and the fatty acids, oleic, etc.

Douglas Harper's Etymology Dictionary

compound formed by an acid joined to an alcohol, 1852, coined in German in 1848 by German chemist Leopold Gmelin (1788-1853), professor at Heidelberg. The name is "apparently 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).


n. (context organic chemistry English) A compound most often formed by the condensation of an alcohol and an acid, with elimination of water. It contains the functional group carbon-oxygen double bond joined via carbon to another oxygen atom.


n. formed by reaction between an acid and an alcohol with elimination of water

Ester, AK -- U.S. Census Designated Place in Alaska
Population (2000): 1680
Housing Units (2000): 814
Land area (2000): 64.628190 sq. miles (167.386237 sq. km)
Water area (2000): 0.051043 sq. miles (0.132201 sq. km)
Total area (2000): 64.679233 sq. miles (167.518438 sq. km)
FIPS code: 23460
Located within: Alaska (AK), FIPS 02
Location: 64.855700 N, 147.978434 W
ZIP Codes (1990):
Note: some ZIP codes may be omitted esp. for suburbs.
Ester, AK

In chemistry, esters are chemical compounds derived from an acid (organic or inorganic) in which at least one –OH (hydroxyl) group is replaced by an –O– alkyl ( alkoxy) group. Usually, esters are derived from a carboxylic acid and an alcohol. Glycerides, which are fatty acid esters of glycerol, are important esters in biology, being one of the main classes of lipids, and making up the bulk of animal fats and vegetable oils. Esters with low molecular weight are commonly used as fragrances and found in essential oils and pheromones. Phosphoesters form the backbone of DNA molecules. Nitrate esters, such as nitroglycerin, are known for their explosive properties, while polyesters are important plastics, with monomers linked by ester moieties.

Ester (disambiguation)

The term Ester may have a few meanings:

Food additives and chemistry:
  • Ester, a functional group in organic chemistry
  • Ester C, ascorbyl palmitate, used as an antioxidant food additive
  • Ester compound - see Ester
  • Ester gum, or Ester of wood rosin, a food additive used as an emulsifier and stabiliser
  • Ester pyrolysis, a vacuum pyrolysis reaction
  • Ester, Alaska, a town
  • Ester Camp Historic District
  • Ester Mountains in Germany
  • Peter Ester, Dutch sociologist and politician
  • Spanish and Portuguese version of the female name Esther
  • Typhoon Ester (disambiguation)
  • "Ester", a song by The Lautsprechers

Usage examples of "ester".

The results flashed back almost instantly: high in ascorbic acid and in several B-complex vitamins, as well as containing several highly rated flavor esters.

When an alkanolamine such as ethanolamine or aminopropanol is reacted with the mixed anhydride of lysergic and trifluoroacetic acids, the reaction product contains not only the desired hydroxy amide but also, to a minor extent, some ammo ester.

Amount of fat in the diet affects bioavailability of lutein esters but not of alpha-carotene, beta-carotene, and vitamin E in humans.

Most conveniently the conversion is carried out by dissolving the ammo ester or mixture containing the ammo ester in a minimum amount of alcohol and adding to the mixture a twofold amount of 4 N alcoholic potassium hydroxide solution.

He dipped into learned works on the mating habits of the bower bird, the decoction of ethers and esters and imitation Irish whiskey, the electronic marvels of the Space Age, proctology made easy, hypnotism, herpetology, and the magical and therapeutic properties of the ancient Chinese pharmacopoeia.

Vexxon against these men, for it had been Nazi-sponsored researchers who had synthesized the first nerve gas in 1936, an organophosphorous ester called tabun.

But he could still smell the rank, semisweet esters of a pre-spice pocket somewhere underneath this sand.

Me esters asked after you in their last letter--they would like you to visit them again.

By the end of 1921 ethyl esters were being administered to 1,000 Culion patients.

The atmosphere was breathable and flavored with smelly esters from abundant plant decay.

Even after all these years, the air in the complex was tainted with the acrid scent of chemicals, as if decades' worth of nitric acid, sulfuric acid, ammonia, mercury, and a host of esters and alcohols had permanently stained the air.

The snowflakes blinked around them, ester and ester, like the leaking blanks on the oldest archive footage, the runny white bits blobbing the white dress of the Tsarina as she turns on a white balcony under a white parasol to laugh at the haemophiliac child in his white sailor's suit.

The chief constituents of the oil are linalool and its acetic ester, linalyl acetate, which is also the characteristic ingredient of oil of bergamot and is present in English oil of Lavender to the extent of 7 to 10 per cent.

A synthetic Otto of Jasmine now exists, however, its composition following more or less closely the constitution of the natural oil, containing benzyl acetate, a benzyl ester found in the natural oil of Jasmine, but the true perfume of Jasmine is not, however, exactly reproducible by any combination of chemical compounds or other natural products thus far known, and a proportion of the natural otto must be added to the mixture of synthetic substances to make the product satisfactory.

Soap is a chemical compound formed when the metal component of the lye, sodium or potassium binds with a free fatty acid and loosely attaches itself to a methyl or ethyl ester in the bio-diesel.