pyrex — English Dictionary

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.

   Usage

   • Uncountable

   Broader terms

   borosilicate glassglass

   Examples

   This steel tube slips into the pyrex glass focus tube, which is jacketed by a vacuum

   There is half of a yesteryear's tin of baked beans in a pyrex bowl

   More examples (1)

   I tiptoed into the kitchen, turned on the fluorescent light over the stove, and peered into the oven. It was still warm, though the gas had been turned off. My dinner was there, in a pyrex dish with a cover.

2. Any borosilicate glass.

   Usage

   • broadly
   • Uncountable

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

   Usage

   • broadly
   • Uncountable