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Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
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noun
A type of natural or artificial glass formed by the sudden melting of silica sand or sandstone by extreme heat (for instance, from a lightning strike, impact event, or nuclear explosion), followed by rapid cooling.
Definition source: English Wiktionary via Wiktextract
Usage: uncountable, usually
Topics: geography, geology, natural-sciences
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
colorless glass made of almost pure silica
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Synonyms: quartz glass, quartz, vitreous silica, crystal
Antonyms: none provided
Broader terms: natural glass
History
From Henry Louis Le Chatelier, the French chemist
