Obsidian meaning

ŏb-sĭdē-ən
A usually black or banded, hard volcanic glass that displays shiny, curved surfaces when fractured and is formed by rapid cooling of lava.
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(mineralogy) A type of black glass produced by volcanoes.
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A hard, usually dark-colored or black volcanic glass with conchoidal fracture, often used as a gem.
noun
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A shiny, usually black, volcanic glass. Obsidian forms above ground from lava that is similar in composition to the magma from which granite forms underground, but cools so quickly that minerals do not have a chance to form within it.
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(poetic) Black.
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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