Definitions

from The Century Dictionary.

  • Lacking bitumen, as anthracite coal in contrast with bituminous coal.

from the GNU version of the Collaborative International Dictionary of English.

  • adjective Containing no bitumen; not bituminous.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective Not bituminous.

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

non- +‎ bituminous

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Examples

  • This is, I believe, the only accessible, or at least available nonbituminous coal in the world; but the best substitute for it is the Welsh semi-bituminous coal, and this was chiefly used by the blockade-runners.

    The Narrative of a Blockade-Runner John Wilkinson

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