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ETYM Latin anthracites a kind of bloodstone; from Greek, like coals, from anthrax, coal or charcoal. Related to Anthrax.
A hard natural coal that burns slowly and gives intense heat | SYN: anthracite coal, hard coal.
Hard, dense, shiny variety of coal, containing over 90% carbon and a low percentage of ash and impurities, which causes it to burn without flame, smoke, or smell. Because of its purity, anthracite gives off relatively little sulfur dioxide when burned.
Anthracite gives intense heat, but is slow-burning and slow to light; it is therefore unsuitable for use in open fires. Its characteristic composition is thought to be due to the action of bacteria in disintegrating the coal-forming material when it was laid down during the Carboniferous period.
Among the chief sources of anthracite coal are Pennsylvania in the US; S Wales, UK; the Donbas, Ukraine and Russia; and Shanxi province, China.

black coal


black diamond


1 > Dense black hematite
2 > Carbonado.

blind coal




A charred substance; charcoal; specifically; a combustible residue remaining after the destructive distillation of coal.





ETYM AS. col; akin to Dutch kool, Old High Germ. chol, cholo, German kohle, Icel. kol, pl., Swed. kol, Dan. kul; cf. Skr. jval to burn. Related to Kiln, Collier.
(Homonym: cole).
Carbonized vegetable matter deposited in the carboniferous period; the material is combustible and has been used for heating since the mid nineteenth century.
Black or blackish mineral substance formed from the compaction of ancient plant matter in tropical swamp conditions. It is used as a fuel and in the chemical industry. Coal is classified according to the proportion of carbon it contains. The main types are anthracite (shiny, with about 90% carbon), bituminous coal (shiny and dull patches, about 75% carbon), and lignite (woody, grading into peat, about 50% carbon). Coal burning is one of the main causes of acid rain.
In the second half of the 18th century, coal became the basis of the Industrial Revolution. Coal fields are widely distributed throughout the temperate N hemisphere, the greatest reserves being in Europe, W Siberia, and the US. In the Southern hemisphere, Australia is a major producer. An increasing use, from 1950–70, of cheap natural gas and oil as fuel and for the production of electricity halted when the energy crisis of the 1970s led to greater exploitation of coal resources. Coal is becoming a major source of synfuel (synthetic gasoline). In the Fischer–Tropsch process (used in Germany in World War II and today in South Africa), the coal is gasified and then catalysts are used to reconstitute it into diesel and jet fuel. In the degradation process (under development in the US for high-octane motor fuel), a liquid fuel is directly produced by adding hydrogen or removing carbon from the coal.



ETYM From Cob a lump.
Related to Cob,
9;, and cf.
Copple, Copplestone.
Rectangular stone with curved top; once used to make roads | SYN: cobblestone, sett.

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