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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.]


(Geological Science) a type of coal occurring as horizontal glassy bands of a nonsoiling friable material
[C20: from Latin vitrum glass + -ain, as in fusain]
References in periodicals archive ?
During the period, a number of products and innovations were launched, such as GPRS roaming, Edge, Blackberry(c) services, Vitrain top-up and Wimax.
MTN Irancell was first-to-market in providing GPRS, which has enabled email solutions, MMS, Data SIMS and Vitrain content portal.