/ Dictionary / Index C chestnut coal: Meaning and Definition of Find definitions for: chest'nut coal" Pronunciation: [key] anthracite in sizes ranging from 1 to 1 in. (3 to 4 cm). Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. chestnut clam chestnut oak Related Content Daily Word Quiz: cosmology Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language