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obsidian |
3 definitions found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Obsidian \Ob*sid"i*an\, 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. Note: 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. From WordNet r 1.6 [wn]: obsidian n : acid or granitic glass; usually dark, but transparent in thin pieces From U.S. Gazetteer (1990) [gazetteer]: Obsidian, ID Zip code(s): 83340
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