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

Place a drop of milk on a microscopical slide and cover with cover glass.

From Human Foods and Their Nutritive Value by Snyder, Harry