OriginFrom pie + r + -ex.
First manufactured by the Corning Glassware Factory in 1915.
* 1957, Letter from the Corning Glassware Factory:
*: "We had a number of prior trademarks ending in the letters ex. One of the first commercial products to be sold under the new mark was a pie plate, and in the interests of euphonism the letter "r" was inserted between pie and ex, and the whole thing condensed to pyrex."
- A brand of glassware produced by the Corning corporation, capable of resisting high temperatures, and suitable for cooking applications, currently made with tempered glass.
- historicalA brand of glassware produced by Corning using borosilicate glass.
- uncountableA 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.
“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”
“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”
- broadly, uncountableAny borosilicate glass.
- broadly, uncountableAny glass capable of withstanding high temperatures, such as tempered glass suitable for cooking.