noun (plural epithelia /-lɪə/)[mass noun] Anatomy
1The thin tissue forming the outer layer of a body’s surface and lining the alimentary canal and other hollow structures.
More example sentences
- Eighty-five percent of human ovarian tumors arise from the epithelium or surface layer of tissue that surrounds the ovaries.
- Each tonsil has an irregular number of ingrowths of the surface epithelium known as tonsillar crypts.
- The lining epithelium was often eroded, and the underlying stroma showed dense infiltration by inflammatory cells.
mid 18th century: modern Latin, from epi- 'above' + Greek thēlē 'teat'.
- More example sentences
- Eyelid closure is a process involving the migration of epithelial cells.
- The cornea is a living membrane, very thin and only composed of epithelial cells over a supporting matrix.
- Many of these cells closely resembled normal superficial epithelial cells.
Definition of epithelium in:
- The US English dictionary