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volcanic glass
noun
- a natural glass produced when molten lava cools very rapidly; obsidian.
volcanic glass
noun
- any of several glassy volcanic igneous rocks, such as obsidian and pitchstone
volcanic glass
- Natural glass produced by the cooling of molten lava too quickly to permit crystallization. Obsidian is a type of volcanic glass.
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Word History and Origins
Origin of volcanic glass1
First recorded in 1830–40
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Example Sentences
Dragonglass: The name accorded to volcanic glass or obsidian.
From The Daily Beast
Women cut themselves with sharp sea-shells or flakes of volcanic glass till the blood ran down.
From Project Gutenberg
The southern end is formed of volcanic glass, or obsidian, as true a glass as any artificially produced.
From Project Gutenberg
He had lain five of his best arrows, tipped with points of volcanic glass, side by side in the snow.
From Project Gutenberg
We have here found our first specimens of petrifactions and obsidian, or volcanic glass.
From Project Gutenberg
The walls glistened with the sparkling smoothness of volcanic glass.
From Project Gutenberg
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