Definition of Coal tar. Meaning of Coal tar. Synonyms of Coal tar
Here you will find one or more explanations in English for the word Coal tar. Also in the bottom left of the page several parts of wikipedia pages related to the word Coal tar and, of course, Coal tar synonyms and on the right images related to the word Coal tar.
Definition of Coal tar
Coal tarTar 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 having a varied composition
according to the temperature and material employed in
Coal tar. See in the Vocabulary.
Mineral tar (Min.), a kind of soft native bitumen.
Tar board, a strong quality of millboard made from junk and
old tarred rope. --Knight.
(a) A cold infusion of tar in water, used as a medicine.
(b) The ammoniacal water of gas works.
Wood tar, tar obtained from wood. It is usually obtained by
the distillation of the wood of the pine, spruce, or fir,
and is used in varnishes, cements, and to render ropes,
oakum, etc., impervious to water. Coal tarCoal Coal, n. [AS. col; akin to D. kool, OHG. chol, cholo, G.
kohle, Icel. kol, pl., Sw. kol, Dan. kul; cf. Skr. jval to
burn. Cf. Kiln, Collier.]
1. A thoroughly charred, and extinguished or still ignited,
fragment from wood or other combustible substance;
2. (Min.) A black, or brownish black, solid, combustible
substance, dug from beds or veins in the earth to be used
for fuel, and consisting, like charcoal, mainly of carbon,
but more compact, and often affording, when heated, a
large amount of volatile matter.
Note: This word is often used adjectively, or as the first
part of self-explaining compounds; as, coal-black; coal
formation; coal scuttle; coal ship. etc.
Note: In England the plural coals is used, for the broken
mineral coal burned in grates, etc.; as, to put coals
on the fire. In the United States the singular in a
collective sense is the customary usage; as, a hod of
Age of coal plants. See Age of Acrogens, under Acrogen.
Anthracite or Glance coal. See Anthracite.
Bituminous coal. See under Bituminous.
Blind coal. See under Blind.
Brown coal, or Lignite. See Lignite.
Caking coal, a bituminous coal, which softens and becomes
pasty or semi-viscid when heated. On increasing the heat,
the volatile products are driven off, and a coherent,
grayish black, cellular mass of coke is left.
Cannel coal, a very compact bituminous coal, of fine
texture and dull luster. See Cannel coal.
Coal bed (Geol.), a layer or stratum of mineral coal.
Coal breaker, a structure including machines and machinery
adapted for crushing, cleansing, and assorting coal.
Coal field (Geol.), a region in which deposits of coal
occur. Such regions have often a basinlike structure, and
are hence called coal basins. See Basin.
Coal gas, a variety of carbureted hydrogen, procured from
bituminous coal, used in lighting streets, houses, etc.,
and for cooking and heating.
Coal heaver, a man employed in carrying coal, and esp. in
putting it in, and discharging it from, ships.
Coal measures. (Geol.)
(a) Strata of coal with the attendant rocks.
(b) A subdivision of the carboniferous formation, between
the millstone grit below and the Permian formation
above, and including nearly all the workable coal beds
of the world.
Coal oil, a general name for mineral oils; petroleum.
Coal plant (Geol.), one of the remains or impressions of
plants found in the strata of the coal formation.
Coal tar. See in the Vocabulary.
To haul over the coals, to call to account; to scold or
Wood coal. See Lignite.
Meaning of Coal tar from wikipedia
- Coal tar
is a thick
dark liquid which
is a by-product of the production
of coke and coal
gas from coal
. It has both medical
- through destructive
can be produced
, wood, petroleum, or peat. Mineral products resembling tar
can be produced
- The two main kinds recognized
creosote. The coal
variety, having stronger
and more toxic
- William Valentine Wright
in 1860, Wright's Traditional
Soap, or Wright's Coal Tar
Soap, is a po****r brand
soap that is designed
- 1850s by Ludwig
Mond, was producer
gas made from coal instead
of coke. It contained ammonia
and coal tar
and was processed
to recover these valuable
and urbanization. By-products from the production process included coal tars
and ammonia, which
were important chemical feedstock
for the dye and chemical...
a white solid
with a pungent
from the distillation
of coal tar
. In 1821, John Kidd cited these
and then described
-tar saturated Organic
Felt Used in Roofing
and Waterproofing, ASTM D4990, Standard Specification
for Coal Tar
Gl**** Felt Used in...
- or manufactured, derived
from petroleum, coal tar
, or plants. Various forms
may also be called tar
, bitumen, or asphalt. Pitch produced
- process breaks
up or 'cracks' large
molecules. Coke, coal
gas, gas carbon, coal tar
liquor, and coal
oil are examples
of commercial products
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