Dictionary.com
Thesaurus.com

durain

American  
[door-eyn, dyoor-] / ˈdʊər eɪn, ˈdyʊər- /

noun

Mineralogy.

  1. the coal forming the dull layers in banded bituminous coal.

Etymology

Origin of durain

1915–20; < Latin dūr ( us ) hard + -ain, from fusain, by analysis as a suffix

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.