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

"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

Proceeds will be used to cover glass and plastic material and distribution costs.

From Washington Times

Gorilla Glass dominates the market for cover glass for electronic equipment, but it faces rivals, including Dragontrail, a chemically toughened glass manufactured by Asahi Glass in Japan.

From Economist

Apple recently invested $200 million in Corning, which supplies cover glass for iPhones, with the intention of supporting the company’s manufacturing efforts, already located in Kentucky.

From The Verge

Plus the sensor itself is less susceptible to being scratched if it sits under the same tough cover glass as the display.

From The Verge