We found 3 dictionaries that define the word bituminous coals:

General (3 matching dictionaries)

1. bituminous coals: Merriam-Webster
2. bituminous coals: Collins English Dictionary
3. bituminous coals: Vocabulary.com

(Note: See bituminous_coal as well.)

Definitions from Wiktionary (bituminous coal) ▸ noun:  Synonym of soft coal ▸ Also see bituminous_coal ▸ Words similar to bituminous coals ▸ Usage examples for bituminous coals ▸ Idioms related to bituminous coals ▸ Wikipedia articles (New!) ▸ Words that often appear near bituminous coals ▸ Rhymes of bituminous coals ▸ Invented words related to bituminous coals