Lexic.us

Definition of Obsidian

1. Noun. Acid or granitic glass formed by the rapid cooling of lava without crystallization; usually dark, but transparent in thin pieces.

Definition of Obsidian

1. n. A kind of glass produced by volcanoes. It is usually of a black color, and opaque, except in thin splinters.

Definition of Obsidian

1. Noun. (mineral) a type of black glass produced by volcanos ¹

2. Adjective. (poetic) black ¹

¹ Source: wiktionary.com

Definition of Obsidian

1. a volcanic glass [n -S]

Medical Definition of Obsidian

1. A kind of glass produced by volcanoes. It is usually of a black colour, 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. Origin: 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. Source: Websters Dictionary (01 Mar 1998)

Lexicographical Neighbors of Obsidian

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