Definition of epithelium in English:

epithelium

noun

Anatomy
  • 1[mass noun] The thin tissue forming the outer layer of a body's surface and lining the alimentary canal and other hollow structures.

    • ‘Each tonsil has an irregular number of ingrowths of the surface epithelium known as tonsillar crypts.’
    • ‘Breakdown of the corneal epithelium increases the risk of stromal surface infection.’
    • ‘The lining epithelium was often eroded, and the underlying stroma showed dense infiltration by inflammatory cells.’
    • ‘Eighty-five percent of human ovarian tumors arise from the epithelium or surface layer of tissue that surrounds the ovaries.’
    • ‘A flattened layer of epithelium was seen lining the cyst in certain areas.’
    1. 1.1The part of the epithelium derived from embryonic ectoderm and endoderm, as distinct from endothelium and mesothelium.

Origin

Mid 18th century: modern Latin, from epi- ‘above’ + Greek thēlē teat.

Pronunciation:

epithelium

/ˌɛpɪˈθiːlɪəm/