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单词 vitrain
释义

WordReference Random House Unabridged Dictionary of American English © 2024
vit•rain  (vitrān),USA pronunciation n. 
  1. Mining, Mineralogythe material of which the friable, vitreous layers in banded bituminous coal are composed. Cf. clarain, durain. 
  • Latin vitr(um) glass + -ain, as in fusain
  • 1915–20

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