Obsidian Definition

ŏb-sĭdē-ən
noun
A hard, usually dark-colored or black volcanic glass with conchoidal fracture, often used as a gem.
Webster's New World
adjective

(poetic) Black.

Wiktionary

Origin of Obsidian

  • Latin obsidiānus misreading of obsiānus (lapis) Obsian (stone), obsidian after Obsius , a Roman who supposedly discovered it or a similar mineral

    From American Heritage Dictionary of the English Language, 5th Edition

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