boghead coal

[ bog-hed ]
/ ˈbɒgˌhɛd /

noun

compact bituminous coal that burns brightly and yields large quantities of tar and oil upon distillation.

Origin of boghead coal

First recorded in 1935–40; named after Boghead, Scotland
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019