vitrain

n. [矿]镜煤,闪炭

词形变化

vitrains 复数 vitrains

释义与例句

n.
  1. 1.

    A constituent of banded bituminous coal consisting of a horizontal glossy band of friable material.

    可数 不可数

词源

From Latin vitreus (“vitreous”) + -ain in fusain; compare French -ain (“-ane”). Coined by British birth control campaigner and paleontologist Marie Stopes in 1918.

来源：wiktionary