/door"ayn, dyoor"-/ , n. Mineral.
the coal forming the dull layers in banded bituminous coal. Cf. clarain, vitrain .
[ 1915-20; dur ( us ) hard + -ain, from FUSAIN, by analysis as a suffix ]
/door"ayn, dyoor"-/ , n. Mineral.
the coal forming the dull layers in banded bituminous coal. Cf. clarain, vitrain .
[ 1915-20; dur ( us ) hard + -ain, from FUSAIN, by analysis as a suffix ]
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012