pea coal

noun
  1. anthracite coal in sizes ranging from about 3/8 to about 13/16 inch (1 to 2 cm).
  2. bituminous coal in sizes ranging from about 3/8 to about 3/4 inch (1 to 1.9 cm).

Origin of pea coal

First recorded in 1880–85
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018