Definitions

1. adjective

relating to or forming epithelium, especially the outer layer of cells covering or lining the body or its organs, especially the skin and mucous membranes.

“The epithelial cells in the lung were damaged due to prolonged exposure to pollutants.”

2. noun

a cell or layer of cells forming the epithelium.

“The pathologist examined the epithelial tissue under a microscope.”

3. noun

the epithelium, especially of a particular organ or part.

“The doctor examined the epithelial lining of the eye to diagnose the condition.”