coal ball


a spherical mass of mineral and plant material embedded in coal beds, ranging in size from that of a pea to that of a boulder.

Nearby words

  1. coagulopathy,
  2. coagulum,
  3. coahuila,
  4. coak,
  5. coal,
  6. coal car,
  7. coal cutter,
  8. coal field,
  9. coal gas,
  10. coal heaver

Origin of coal ball

First recorded in 1735–45 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019