coal
( coals plural )
1 n-uncount Coal is a hard black substance that is extracted from the ground and burned as fuel.
Gas-fired electricity is cheaper than coal...
2 n-plural Coals are burning pieces of coal. It is important to get the coals white-hot before you start cooking.
coal mine ( coal mines plural ) , coalmine A coal mine is a place where coal is dug out of the ground. n-count
coal miner ( coal miners plural ) , coalminer A coal miner is a person whose job is mining coal. n-count
coal scuttle ( coal scuttles plural ) A coal scuttle is a container for keeping coal in.
(mainly BRIT) n-count
coal tar , coal-tar
Coal tar is a thick black liquid made from coal which is used for making drugs and chemical products. n-uncount
...coal tar dyes.
Traducción diccionario Collins Ingles - Cobuild  

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"Collins Cobuild English Dictionary for Advanced Learners 4th edition published in 2003 © HarperCollins Publishers 1987, 1995, 2001, 2003 and Collins A-Z Thesaurus 1st edition first published in 1995 © HarperCollins Publishers 1995"