volcanic glass

English

Noun

volcanic glass (countable and uncountable, plural volcanic glasses)

  1. A natural glass produced by the cooling of molten lava, or a liquid fraction of it, too rapidly to permit crystallization.

References

  • United States Bureau of Mines, Dictionary of Mining, Mineral, and Related Terms (1996).)
This article is issued from Wiktionary. The text is available under Creative Commons Attribution-Share Alike 4.0 unless otherwise noted. Additional terms may apply for the media files.