From Longman Dictionary of Contemporary EnglishPyrexPy‧rex /ˈpaɪreks/ noun [uncountable] trademarkDFUTIG a special type of strong glass that does not break when it gets very hot and that is used to make cooking dishes, plates etc
Examples from the Corpus
Pyrex• Twentythree stainless steel dishes, Denby casseroles and Pyrex serving sets have gone to that great built-in-obsolescence pile in the sky.• They came to life with fury, throwing tiny sparks and sinking into red rigidity under the Pyrex laboratory flask.• Salmon patties sat casually in their Pyrex homestead, just challenging you not to wolf them down as accompaniment. 