Pyrex

Meaning

Noun

• A borosilicate glass with a low coefficient of thermal expansion; used for heat-resistant glassware in cooking and chemistry

Origin

• 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."