vitrain

noun

vit·​rain

ˈvi‧ˌtrān

plural -s

: a constituent of banded bituminous coal that has a vitreous or glossy fracture compare clarain, durain, fusain

Word History

Etymology

vitr- + -ain (as in fusain)

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

• More than 250,000 words that aren't in our free dictionary
• Expanded definitions, etymologies, and usage notes
• Advanced search features
• Ad free!