Pyrex
name, noun ·Rare ·Advanced level
Definitions
- 1 Alternative form of pyrex. alt-of, alternative, uncountable
- 2 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
"This steel tube slips into the pyrex glass focus tube, which is jacketed by a vacuum"
- 3 a borosilicate glass with a low coefficient of expansion; used for heat-resistant glassware in cooking and chemistry wordnet
- 4 Any borosilicate glass. broadly, uncountable
- 5 Any glass capable of withstanding high temperatures, such as tempered glass suitable for cooking. broadly, uncountable
- 1 A brand of glassware produced by the Corning corporation, capable of resisting high temperatures, and suitable for cooking applications, currently made with tempered glass.
- 2 A brand of glassware produced by Corning using borosilicate glass. historical
Example
More examples"This steel tube slips into the pyrex glass focus tube, which is jacketed by a vacuum"
Etymology
From 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."
Genericization of the trademark Pyrex
Related phrases
More for "pyrex"
Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.