coal

n. fuel made from carbon; cinder, ember

v. provide with coal; take in coal; burn to coal

Coal (IPA: ) is a fossil fuel formed in swamp ecosystems where plant remains were saved by water and mud from oxidization and biodegradation. Coal is a readily combustible black or brownish-black rock. It is a sedimentary rock, but the harder forms, such as anthracite coal, can be regarded as metamorphic rocks because of later exposure to elevated temperature and pressure. It is composed primarily of carbon along with assorted other elements, including sulfur. It is the largest single source of fuel for the generation of electricity world-wide, as well as one of the largest sources of carbon dioxide emissions, which is considered the primary cause of global warming. Coal is extracted from the ground by coal mining, either underground mining or open pit mining (surface mining).
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Noun
1. fossil fuel consisting of carbonized vegetable matter deposited in the Carboniferous period
(hypernym) fossil fuel
(hyponym) anthracite, anthracite coal, hard coal
(substance-meronym) carbon, C, atomic number 6
(derivation) char
2. a hot glowing or smouldering fragment of wood or coal left from a fire
(synonym) ember
(hypernym) fragment
(derivation) char
Verb
1. burn to charcoal; "Without a drenching rain, the forest fire will char everything"
(synonym) char
(hypernym) burn, combust
2. supply with coal
(hypernym) supply, provide, render, furnish
3. take in coal; "The big ship coaled"
(hypernym) take in, gather in

(v. t.)
To supply with coal; as, to coal a steamer.
  

(v. t.)
To mark or delineate with charcoal.
  

(v. t.)
To burn to charcoal; to char.
  

(v. i.)
To take in coal; as, the steamer coaled at Southampton.
  

(n.)
A thoroughly charred, and extinguished or still ignited, fragment from wood or other combustible substance; charcoal.
  

(n.)
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.
  

A black or brownish-black solid, combustible substance formed by the partial decomposition of vegetable matter without access to air. The rank of coal, which includes anthracite, bituminous coal, subbituminous coal, and lignite, is based on fixed carbon, volatile matter, and heating value. Coal rank indicates the progressive alteration, or coalification, from lignite to anthracite. Lignite contains approximately 9 to 17 million British Thermal Unit (BTU) per ton. The heat contents of subbituminous and bituminous coal range from 16 to 24 million BTU per ton, and from 19 to 30 million BTU per ton, respectively. Anthracite contains approximately 22 to 28 million BTU per ton. (DOE3)