cover glass
Noun
Meaning
a small and very thin piece of glass used to cover the specimen on a microscope slide
Source: WordNetSynonyms
Hypernyms
Examples
That changes the cover glass for the iMac’s 27-inch display to a matte finish, though Apple is keen to point out that it’s not just slapping on a top coating and calling it a day.
As the business impact of COVID-19 spreads, the global solar cover glass market 2020-2024 is expected to have negative growth.