翻訳と辞書
Words near each other
・ observational
・ observative
・ observator
・ observatory
・ observe
・ observer
・ observership
・ observing
・ obsess
・ obsession
obsidian
・ obsidional
・ obsigillation
・ obsign
・ obsignate
・ obsignation
・ obsignatory
・ obsolesce
・ obsolescence
・ obsolescent


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obsidian : 英英辞書
Obsid"ian
(), n.[L. Obsidianus lapis, so named, according to Pliny, after one Obsidius, who discovered it in Ethiopia: cf.F. obsidiane, obsidienne. The later editions of Pliny read Obsianus lapis, and Obsius, instead of Obsidianus lapis, and Obsidius.] (Min.) A kind of glass produced by volcanoes. It is usually of a black color, and opaque, except in thin splinters.
In a thin section it often exhibits a fluidal structure, marked by the arrangement of microlites in the lines of the flow of the molten mass.



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