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.

---

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

---

Etymology

Origin of borosilicate glass

First recorded in 1930–35

Example Sentences

See Examples For:

borosilicate glass

The team created a fully tunable heterodyne receiver, a key component for CV-QKD and CV-QRNG, by writing the optical circuit directly inside 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

The OXO Good Grips 8 Piece Smart Seal Glass Rectangle Container Set is one of the few sets we looked at that’s made with borosilicate glass, which is a great material for withstanding temperature changes.

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