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tar

 [tahr]
a dark brown or black viscid liquid from the wood of various species of pine, or found as a by-product of the destructive distillation of bituminous coal (see coal tar). It is a complex mixture, the source of organic substances such as cresol, creosol, naphthalene, paraffin, phenol, and toluene. Formerly used as an oral medication in treatment of various conditions, it has been found to be toxic and carcinogenic and now has only limited topical use in certain skin diseases.
coal tar a by-product obtained in destructive distillation of bituminous coal; if its fumes are inhaled or if it is ingested in its natural state, it is toxic and carcinogenic. A preparation is used in ointment or solution in treatment of eczema and psoriasis.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

TAR

Acronym for thrombocytopenia and absent radius. See: thrombocytopenia-absent radius syndrome.

tar

(tahr),
A thick, semisolid, blackish brown mass, of complex hydrocarbon composition, obtained by destructive distillation of carbonaceous materials. For individual tars, see specific names.
Farlex Partner Medical Dictionary © Farlex 2012

tar

(tär)
n.
1. A dark, oily, viscous material, consisting mainly of hydrocarbons, produced by the destructive distillation of organic substances such as wood, coal, or peat.
2. See coal tar.
3. A solid residue of tobacco smoke containing byproducts of combustion.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

TAR

Abbreviation for thrombocytopenia and absent radius.
See: thrombocytopenia-absent radius syndrome
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive ?
Likewise, the TARS is also an oversized weather balloon that could provide valuable weather-related data such as ambient temperature, pressure, wind speed and other information needed for weather forecasting.
To improve the tar yield and fraction of light components in coal tar, catalytic coal pyrolysis experiments have been performed through mixing or without mixing of coal with catalysts in previous study [22-31].
The gas sampling train consisted of a short and small volume sampling line (1) to avoid clogging due to condensation, a number of impinge bottles (3) filled with proper solvent for tar trapping and a suction pump (6) and flow measuring rotameter (7).
After decades of trial and error TAR is becoming a viable alternative to the gold-standard treatment option for end-stage ankle arthritis patients, ankle fusion, which had a risk of complications including mal-alignment, stress fractures, continued pain, and arthritis developing in adjacent joints.
The industry needs gap-filling research/technology focused oil a parallel research program into tars management that examines catalytic and non-catalytic systems.
Do not use the same tools to apply asphalt and coal tar unless they are clean.
The absorbed dose rates in air calculated from the radioactivity concentration of the various samples are given in Tables 1 and 2 for the overburden, shale, and tar sand respectively.
Andrew Nikiforuk's and Tony Clarke's books are the first efforts to synthesize all the recent interest in and controversy about the tar sands for a popular audience.
Energy Policy Development Group has described the tar sands as "a pillar of sustained North American energy and economic security." Canada's so-called "black gold" has come to be regarded as an abundant, secure, and affordable source of crude oil.
Tar Beach 2 can be viewed online at: http://www.dareonline.org/artwork/ringgold1.html
The Tar Sands marked the beginning of the end of the Ralph Thomas era and the start of Sam Levene's term as executive producer.