subbituminous

play
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

1835

First Known Use of subbituminous

1835


Seen and Heard

What made you want to look up subbituminous? Please tell us where you read or heard it (including the quote, if possible).