tar distillation

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• Tar — is a viscous black liquid derived from the destructive distillation of organic matter. Most tar is produced from coal as a byproduct of coke production, but it can also be produced from petroleum, peat or wood.Types of tarGeneralThe word tar is… …   Wikipedia

• Tar — Tar, n. [OE. terre, tarre, AS. teru, teoru; akin to D. teer, G. teer, theer, Icel. tjara, Sw. tj[ a]ra, Dan. ti[ae]re, and to E. tree. [root]63. See {Tree}.] A thick, black, viscous liquid obtained by the distillation of wood, coal, etc., and… …   The Collaborative International Dictionary of English

• Tar board — Tar Tar, n. [OE. terre, tarre, AS. teru, teoru; akin to D. teer, G. teer, theer, Icel. tjara, Sw. tj[ a]ra, Dan. ti[ae]re, and to E. tree. [root]63. See {Tree}.] A thick, black, viscous liquid obtained by the distillation of wood, coal, etc., and …   The Collaborative International Dictionary of English

• Tar water — Tar Tar, n. [OE. terre, tarre, AS. teru, teoru; akin to D. teer, G. teer, theer, Icel. tjara, Sw. tj[ a]ra, Dan. ti[ae]re, and to E. tree. [root]63. See {Tree}.] A thick, black, viscous liquid obtained by the distillation of wood, coal, etc., and …   The Collaborative International Dictionary of English

• tar — tar1 [tär] n. [ME terre < OE teru < PGmc * terw(i)a , substance from trees < IE base * deru , TREE] 1. a thick, sticky, brown to black liquid with a pungent odor, obtained by the destructive distillation of wood, coal, peat, shale, etc …   English World dictionary

• tar — A thick, semisolid, blackish brown mass, of complex hydrocarbon composition, obtained by the destructive distillation of carbonaceous materials. For individual tars, see specific names. rectified t. oil a volatile oil distilled from pine t.; used …   Medical dictionary

• TAR — Acronym for thrombocytopenia and absent radius. See thrombocytopenia absent radius syndrome. * * * thoracic aortic rupture; thrombocytopenia with absent radii [syndrome]; tissue air ratio; total abortion rate; transactivation response; transanal… …   Medical dictionary

• tar — tar1 /tahr/, n., v., tarred, tarring, adj. n. 1. any of various dark colored viscid products obtained by the destructive distillation of certain organic substances, as coal or wood. 2. coal tar pitch. 3. smoke solids or components: cigarette tar …   Universalium

• tar — I [[t]tɑr[/t]] n. v. tarred, tar•ring, adj. 1) chem. any of various dark colored viscid products obtained by the destructive distillation of certain organic substances, as coal or wood 2) chem. coal tar pitch 3) chem. smoke solids or components:… …   From formal English to slang

• tar — I. /ta / (say tah) noun 1. any of various dark coloured viscid products obtained by the destructive distillation of certain organic substances, such as coal, wood, etc. 2. coal tar pitch. 3. the resinous partially combusted material produced in… …  

• tar — I. noun Etymology: Middle English terr, tarr, from Old English teoru; akin to Old English trēow tree more at tree Date: before 12th century 1. a. a dark brown or black bituminous usually odorous viscous liquid obtained by destructive distillation …   New Collegiate Dictionary