buckwheat coal

noun

1. anthracite coal in sizes ranging from 5/16 to 9/16 inch (7.9 to 13.9 m).

Word History and Origins

Origin of buckwheat coal¹

An Americanism dating back to 1880–85

Example Sentences

We have done this with a pipeless furnace and have been able to burn the cheaper buckwheat coal almost entirely as a result.

From Project Gutenberg