Endothelium

noun

Definitions

Noun
  1. 1
    A thin layer of flat epithelial cells that lines the heart, serous cavities, lymph vessels, and blood vessels.
  2. 2
    an epithelium of mesoblastic origin; a thin layer of flattened cells that lines the inside of some body cavities wordnet

Etymology

From endo- + -thelium, as in epithelium.

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