The definition of coal is a dark brown to black carbon-rich rock that is mined from mountains or below ground and is burned as fuel.
Facts About Turn Coal Into Electricity
- A coal power plant works continuously to burn coal to produce electricity.
- The process requires the addition of large amounts of water which is then recycled back into the process.
- Coal cannot be burned efficiently in its natural form. It must be pulverized.
- Hot air is added to the pulverized coal powder and it is burned. The burning coal heats a boiler which makes steam to power a generator that creates electricity.
An example of coal is the fuel used to grill meat on an outdoor grill using briquettes.
A small pile of coal.
coal definition by Webster's New World
- a kind of dark brown to black, combustible, sedimentary rock resulting from the partial decomposition of vegetable matter away from air and under varying degrees of increased temperature and pressure over a period of millions of years: used as a fuel and in the production of coke, coal gas, water gas, and many coal-tar compounds
- a piece (or collectively, pieces) of this rock
- a piece of glowing or charred wood, coal, or similar substance; ember
Origin: Middle English and amp; Old English col, charcoal, live coal, akin to German kohle, Old Norse kol ; from Indo-European base an unverified form g(e)u-lo-, live coal from source Irish gual
- to reduce (a substance) to charcoal by burning
- to provide with coal
coal definition by American Heritage Dictionary
- a. A natural dark brown to black graphitelike material used as a fuel, formed from fossilized plants and consisting of amorphous carbon with various organic and some inorganic compounds.b. A piece of this substance.
- A glowing or charred piece of solid fuel.
- To burn (a combustible solid) to a charcoal residue.
- To provide with coal.
Origin: Middle English col, from Old English.
coal - Investment & Finance Definition
A dark brown to black combustible sedimentary rock that is used as a fuel source. It accounts for the generation of about 55 percent of the total electricity output in the United States. The United States has 30 percent of the world’s bituminous and anthracite coal reserves, more than any other country except China, which consumes nearly all of its own production. Coal futures are traded on the New York Mercantile Exchange (NYMEX). Coal futures are a relatively new addition to the NYMEX, with trading beginning only in the late 1990s. Its trading symbol is QL.Webster's New World Finance and Investment Dictionary Copyright © 2010 by Wiley Publishing, Inc., Indianapolis, Indiana. Used by arrangement with John Wiley & Sons, Inc.
coal - Phrases/Idioms
haul over the coalsor rake over the coals or drag over the coals or call over the coals
heap coals of fire on someone's head
coal - Science Definition