cover glass

American  

noun

1. a thin, round or square piece of glass used to cover an object mounted on a slide for microscopic observation.

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cover glass British  

noun

1. a thin square of mounted glass used to protect a photographic slide

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Etymology

Origin of cover glass

First recorded in 1880–85

Example Sentences

Specific figures Apple announced were a $2.5 billion commitment to make iPhone cover glass in Kentucky with longtime supplier Corning, and a $500 million partnership to produce rare-earth magnets in the U.S.

From The Wall Street Journal • Nov. 1, 2025

"Applying protective cover glass layers on either side of the optical diffuser largely maintains the optical properties, yet protects against scratching," says Akira Saito, senior author.

From Science Daily • Oct. 12, 2023

Also, both screens are laminated, unlike the base-model iPad, so the pixels should look like they come right up to the cover glass.

From The Verge • Sep. 17, 2021

Lens Technology is now one of the leading suppliers of the so-called cover glass used in laptops, tablets and mobile devices, including the Apple iPhone and the Samsung Galaxy.

From New York Times • Jul. 30, 2015

The membrane is very tough and retains its form easily under pressure of the cover glass.

From Marine Protozoa from Woods Hole Bulletin of the United States Fish Commission 21:415-468, 1901 by Calkins, Gary N. (Gary Nathan)