sub·​bi·​tu·​mi·​nous ˌsəb-bə-ˈtü-mə-nəs How to pronounce subbituminous (audio)
: of, relating to, or being coal of lower rank than bituminous coal but higher than lignite

Word History

First Known Use

1835, in the meaning defined above

Time Traveler
The first known use of subbituminous was in 1835

Dictionary Entries Near subbituminous

Cite this Entry

“Subbituminous.” Dictionary, Merriam-Webster, Accessed 28 Nov. 2023.

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