IPA: /ˈkʌvərˌslɪp/
KK: /ˈkʌvərˌslɪp/
A thin piece of glass that is placed over a sample on a microscope slide to protect it and improve the clarity of the image.
The scientist carefully placed a coverslip over the specimen to observe it under the microscope.
Coverslip → It is formed from "cover" (from Old French *couvrir*, meaning to cover) and "slip" (from Old English *slypan*, meaning to slide or glide). The word "coverslip" refers to a thin piece of glass that is used to cover a specimen on a microscope slide, effectively sliding over it to protect and contain it.
Think of a thin piece of glass that 'covers' something — 'cover' means to protect, and 'slip' suggests it slides over the specimen.