borosilicate glass

American  

noun

1. a glass containing 5 percent or more of B 2 O 3 , highly resistant to heat and shock, used especially in making cookware and chemical glassware.

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borosilicate glass British  

noun

1. any of a range of heat- and chemical-resistant glasses, such as Pyrex, prepared by fusing together boron(III) oxide, silicon dioxide, and, usually, a metal oxide

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Etymology

Origin of borosilicate glass

First recorded in 1930–35

Example Sentences

Researchers from the University of Padua, Politecnico di Milano, and the CNR Institute for Photonics and Nanotechnologies have demonstrated a new approach using an unexpected material: borosilicate glass.

From Science Daily • Mar. 24, 2026

This handmade glass candlestick made of colorful borosilicate glass is an elegant way to elevate the mood, on its own, or in pairs, illuminated by a candle or standing alone.

From Los Angeles Times • Dec. 1, 2022

Boric oxide is necessary for the production of heat-resistant borosilicate glass, like that shown in Figure 18.15 and certain optical glasses.

From Textbooks • Feb. 14, 2019

Some food storage containers are made from borosilicate glass because it’s resistant to thermal shock.

From Slate • Sep. 7, 2018

In this demonstration, a borosilicate glass bead becomes undetectable in a beaker of baby oil because light travels through both substances at about the same speed.

From New York Times • Apr. 2, 2015