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

Meant to compete with flagships from Apple, Google, and Samsung, the OV1 will have a stainless steel and titanium housing, a ceramic back, Corning Victus cover glass, and a Qualcomm processor.

From The Verge • Mar. 3, 2022

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 cover glass being in position, the tube is closed by screwing on the cap.

From Scientific American Supplement No. 822, October 3, 1891 by Various