ester — n. Chem. any of a class of organic compounds produced by replacing the hydrogen of an acid by an alkyl, aryl, etc. radical, many of which occur naturally as oils and fats. Derivatives: esterify v.tr. ( ies, ied). Etymology: G, prob. f. Essig… … Useful english dictionary
ÉTHER — La notion d’éther est aussi vieille que la physique, mais sa signification a considérablement varié, suivant en cela l’évolution des théories et les progrès de l’expérience. Oscillant entre l’idée de feu, de lumière et celle de représentation… … Encyclopédie Universelle
Ether lipid — Ether lipids are lipids in which one or more of the carbon atoms on glycerol is bonded to an alkyl chain via an ether linkage, as opposed to the usual ester linkage. TypesEther lipids are called plasmalogens (1 O 1 alkenyl 2… … Wikipedia
Ether — E ther ([=e] th[ e]r), n. [L. aether, Gr. a iqh r, fr. a i qein to light up, kindle, burn, blaze; akin to Skr. idh, indh, and prob. to E. idle: cf. F. [ e]ther.] [Written also {[ae]ther}.] 1. (Physics) A medium of great elasticity and extreme… … The Collaborative International Dictionary of English
Ether engine — Ether E ther ([=e] th[ e]r), n. [L. aether, Gr. a iqh r, fr. a i qein to light up, kindle, burn, blaze; akin to Skr. idh, indh, and prob. to E. idle: cf. F. [ e]ther.] [Written also {[ae]ther}.] 1. (Physics) A medium of great elasticity and… … The Collaborative International Dictionary of English
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… … Etymology dictionary
ester — [es′tər] n. [Ger, contr. < essigäther < essig, vinegar (< L acetum: see ACETO ) + äther (< L aether), ETHER] an organic compound, comparable to an inorganic salt: generally, HR (inorganic acid) +R1OH (alcohol) = RR1 (ester) + H2O… … English World 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… … The Collaborative International Dictionary of English
ester — 1. ester [ ɛste ] v. intr. <conjug. : seult inf.> • 1384; « se tenir debout » 1080; lat. jurid. stare ♦ Dr. Ester en justice, ester en jugement : soutenir une action en justice comme demandeur ou défendeur. ⇒ intenter, poursuivre. ester 2.… … Encyclopédie Universelle
Ester — For other uses, see Ester (disambiguation). A carboxylic acid ester. R and R denote any alkyl or aryl group, respectively Esters are chemical compounds derived by reacting an oxoacid with a hydroxyl compound such as an alcohol or phenol … Wikipedia
Ester — Pour les articles homonymes, voir Ester (homonymie). Pour l’article homophone, voir Esther … Wikipédia en Français