vitrain

/vi-treyn/US // ˈvɪ treɪn //UK // (ˈvɪtreɪn) //

卵磷脂,卵石,卵巢癌,卵巢

Definitions

n.名词 noun

1
- : the material of which the friable, vitreous layers in banded bituminous coal are composed.