vit·rain 
(vĭtrān)
(vĭtrān)n.
A brilliant black band in bituminous coal, characterized by cubic cleavage, a conchoidal fracture, and a vitreous luster.
[Latin vitreus, made of glass, glassy; see VITREOUS + (FUS)AIN.]
| 单词 | vitrain |
| 释义 | vit·rain (vĭtrān)n. A brilliant black band in bituminous coal, characterized by cubic cleavage, a conchoidal fracture, and a vitreous luster. [Latin vitreus, made of glass, glassy; see VITREOUS + (FUS)AIN.] |
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