borosilicate: meaning, definition, pronunciation and examples

No, it is not unbreakable. It is highly resistant to thermal shock (sudden temperature changes) and more durable than ordinary soda-lime glass, but it can still break from mechanical impact.

Historically, the Pyrex trademark referred to borosilicate glass. However, in many consumer products, modern Pyrex is often made from tempered soda-lime glass. For laboratory use, Pyrex-branded glassware is typically still borosilicate.

While it is much more heat-resistant, not all borosilicate glassware is designed for direct flame use. Laboratory-grade beakers often are, but consumer cookware should be checked for the manufacturer's instructions.

Ordinary glass (soda-lime glass) is made from silica, soda, and lime. Borosilicate glass replaces most of the soda and lime with boron trioxide (B2O3), which drastically lowers its coefficient of thermal expansion.

A specific type of glass or glassware made primarily from silica and boron trioxide.

Borosilicate is usually technical/scientific, with commercial/consumer use in specific contexts (e.g., kitchenware). in register.

Borosilicate: in British English it is pronounced /ˌbɔːrə(ʊ)ˈsɪlɪkət/, and in American English it is pronounced /ˌbɔːroʊˈsɪlɪkət/. Tap the audio buttons above to hear it.