Word.ws English Dictionary

pyrex

pyrex noun: a kind of heat-resistant borosilicate glass, made by mixing a high concentration of boron oxides into the molten glass to reduce its thermal expansion coefficient.

Noun (1)

pyrex (uncountable)

  1. A kind of heat-resistant borosilicate glass, made by mixing a high concentration of boron oxides into the molten glass to reduce its thermal expansion coefficient.
    • This steel tube slips into the pyrex glass focus tube, which is jacketed by a vacuum1993, George Samuel Schuyler with Robert A. Hill and R. Kent Rasmussen, Black Empire, page 53
    • There is half of a yesteryear's tin of baked beans in a pyrex bowl2007, Jane Gardam, The Queen of the Tambourine
  2. (broadly) Any borosilicate glass.
  3. (broadly) Any glass capable of withstanding high temperatures, such as tempered glass suitable for cooking.

Proper noun capitalized: Pyrex

Pyrex

  1. A brand of glassware produced by the Corning corporation, capable of resisting high temperatures, and suitable for cooking applications, currently made with tempered glass.
  2. (historical) A brand of glassware produced by Corning using borosilicate glass.

Noun (2) capitalized: Pyrex

Pyrex (uncountable)

  1. (alternative) Alternative form of pyrex.

pyrex meaning in Arabic

pyrex in Arabic

heat-resistant borosilicate glass
بيركس

Origin of pyrex

Genericized trademark from Pyrex.

From pie + r + -ex. 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." * By surface analysis, the name also suggests pyr- (“fire”) + rex (“king”), thus connoting superior performance at high temperatures; in this regard, compare also the name of a major competing brand, Fire-King.

Questions about pyrex

What does pyrex mean?
Pyrex means a kind of heat-resistant borosilicate glass, made by mixing a high concentration of boron oxides into the molten glass to reduce its thermal expansion coefficient.
What is pyrex in Arabic?
Pyrex in Arabic is بيركس. See Pyrex meaning in Arabic.
What part of speech is pyrex?
Pyrex can be a noun or a proper noun.

Words near pyrex in the dictionary

  1. pyretogenetic
  2. pyretogenic
  3. pyretogenous
  4. pyretology
  5. pyretotherapy
  6. pyrex
  7. pyrexia
  8. pyrexiae
  9. pyrexial
  10. pyrexias
  11. pyrexic

Source and license

Adapted from Wiktionary: pyrex (page history and authors); Pyrex (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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