Question

What do you mean by coverslip? Give it's function?​

Answer 1

Coverslip a very thin piece of glass placed over a specimen on a glass slide that is to be examined under a microscope.

The main function of the cover slip is to keep solid specimens pressed flat, and liquid samples shaped into a flat layer of even thickness. This is necessary because high resolution microscopes have a very narrow region within which they focus. The cover glass often has several other functions.