vitrain

[ vi-treyn ]
/ ˈvɪ treɪn /

noun

the material of which the friable, vitreous layers in banded bituminous coal are composed.
Compare clarain, durain.

Origin of vitrain

1915–20; < Latin vitr(um) glass + -ain, as in fusain

British Dictionary definitions for vitrain

vitrain
/ (ˈvɪtreɪn) /

noun

a type of coal occurring as horizontal glassy bands of a nonsoiling friable material

Word Origin for vitrain

C20: from Latin vitrum glass + -ain, as in fusain