obsidian

noun ob·sid·i·an \ əb-ˈsi-dē-ən \
|Updated on: 20 May 2018

Definition of obsidian

: a dark natural glass formed by the cooling of molten lava

Recent Examples of obsidian from the Web

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Origin and Etymology of obsidian

New Latin obsidianus, from Latin obsidianus lapis, false manuscript reading for obsianus lapis, literally, stone of Obsius, from Obsius, its supposed discoverer


OBSIDIAN Defined for English Language Learners

obsidian

Definition of obsidian for English Language Learners

  • : a dark natural glass that forms when lava cools


OBSIDIAN Defined for Kids

obsidian

noun ob·sid·i·an \ əb-ˈsi-dē-ən \

Definition of obsidian for Students

: a smooth dark rock formed by the cooling of lava

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