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Definition of obsidian

obsidian

/əbˈsɪd.i.ən/
ob · sid · i · an

Plural:obsidians
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obsidian Lexical Profile

obsidian Game Scores & Validity

• noun

1

A dark, lustrous, naturally occurring volcanic glass formed by the rapid cooling of viscous lava, historically fractured to make sharp blades, arrowheads, and mirrors.

Example

"Archaeologists uncovered several finely flaked obsidian spearheads at the ancient settlement site."


2

A deep, glossy shade of black resembling dark volcanic glass.

Example

"The luxury sedan was finished in a sleek coat of polished obsidian."

• adjective

1

Resembling volcanic glass in having a lustrous, deep, dark black color.

Example

"The night sky above the desert was a vast, obsidian expanse dotted with bright stars."

Synonyms
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Antonyms
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• Rhymes for obsidian

Word Origin & Etymology

Borrowed in the late 17th century from Latin 'obsidianus', a scribal misreading in early manuscripts of Pliny the Elder's 'Natural History' for 'obsianus', named after Obsius, a Roman credited with discovering a similar dark stone in Ethiopia.

Cite this Entry


Wordmom. (2026). Definition of Obsidian. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/obsidian
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