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ENGLISH · A WORD WITH POSSIBILITIES

pyrex.

A kind of heat-resistant borosilicate glass, made by mixing a high concentration of boron oxides into the molten glass to reduce its thermal expansion coefficient.

5 characters2 syllables approx.English language

Meaning & usage

noun
  1. A kind of heat-resistant borosilicate glass, made by mixing a high concentration of boron oxides into the molten glass to reduce its thermal expansion coefficient.

    uncountable
  2. Any borosilicate glass.

    broadly · uncountable
  3. Any glass capable of withstanding high temperatures, such as tempered glass suitable for cooking.

    broadly · uncountable
Where this word comes from

Genericized trademark from Pyrex.

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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.

Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.