subbituminous

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adjective sub·bi·tu·mi·nous \ˌsəb-bə-ˈtü-mə-nəs, -bī-, -ˈtyü-\

Definition of subbituminous

  1. :  of, relating to, or being coal of lower rank than bituminous coal but higher than lignite

First Known Use of subbituminous

1835


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