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Douglas Harper's Etymology Dictionary

1915, proprietary name (Corning Glass Works, Corning, N.Y.), arbitrary coinage, in which eager etymologists see implications of Greek pyr "fire" and perhaps Latin rex "king;" but the prosaic inventors say it was based on pie (n.1), because pie dishes were among the first products made from it. The -r- is purely euphonious.


n. A kind of heat-resistant glass.

For the programming language, see Pyrex (programming language). Not to be confused with PUREX.

Pyrex ( trademarked as PYREX) is a brand introduced by Corning Inc. in 1908 for a line of clear, low-thermal-expansion plastic borosilicate glass used for laboratory glassware and kitchenware. Pyrex sold in the United States is made of tempered soda-lime glass; outside of North America the costlier borosilicate is still used.

Corning no longer manufactures or markets Pyrex-branded borosilicate glass kitchenware and bakeware in the US. World Kitchen, LLC, which was spun off from Corning in 1998, licensed the pyrex (all lower case) brand for their own line of kitchenware productsdifferentiated by their use of clear tempered soda-lime glass instead of borosilicate.

Pyrex (programming language)

Pyrex is a programming language developed to aid in creating Python modules. Its syntax is very close to Python. The goal is to make it easy for Python programmers to write the non-Python supporting code usually required for interfacing modules in a language which is as close to Python as possible.

Usage examples of "pyrex".

Then my eye caught on a long Pyrex dish nearby, and I was doubly impressed.

In the fever dream of his perceptual space, it resembled a dirty Pyrex tube, slowly rotating.

It was Lois, with a dish of bread pudding in her hands, one of her rectangular Pyrex casseroles from fifty years ago.

All waste products gelate, coalesce, and are sucked out of the null-gravity free fall enclosure through egress tiles in the sterile white pyrex floor.

In any case, the goldfish is alive and kicking, or should I say swimming, in one of your Pyrex dishes.

The Pyrex dish she carried did not go with the rest of her, and she was staring at us with a blend of calculation and discomfort that seemed disproportionate to the collision.

He was a complete surprise and terribly premature, and withered, and he spent the next many weeks waggling his withered and contractured arms up at the Pyrex ceilings of incubators, being fed by tubes and monitored by wires and cupped in sterile palms, his head cradled by a thumb.

I pour five ounces of honey into a Pyrex measuring cup and then hunker down to rummage in the counter under the sink for a quart Ball jar--pale water-blue glass with a heavy lid of dull, pewter-gray metal.

Borosilicate glass, such as that sold under the trademark Pyrex, is preferred, because it is especially resistant to acids, high temperatures, and sudden changes in temperature (thermal shock).

She set a deep Pyrex dish on the counter and hunted down brown and white sugar, all-purpose flour, vanilla extract, eggs, salt, and baking soda.