caking coal

English

Noun

A bituminous coal which softens and becomes pasty or semiviscid when heated. On increasing the heat, the volatile products are driven off, and a coherent, grayish-black, cellular mass of coke is left.

Part or all of this entry has been imported from the 1913 edition of Webster’s Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.
(See the entry for “caking coal”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.)