Definition of Pyrex™ noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˈpaɪreks//
; NAmE NAmE//ˈpaɪreks//
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a type of hard glass that does not break at high temperatures, and is often used to make dishes for cooking food in Word Origin early 20th cent.: an invented word.
See the Oxford Advanced American Dictionary entry: Pyrex™