used for borosilicate glass and glassware resistant to heat, chemicals, and electricity

Browse Nearby Words

Cite this Entry

“Pyrex.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Pyrex. Accessed 7 Jul. 2026.

Kids Definition

used for glass and glassware that is resistant to heat, chemicals, and electricity

Medical Definition

used for glass and glassware that contains appreciable oxide of boron and is resistant to heat, chemicals, and electricity

More from Merriam-Webster on Pyrex

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!