[ ˌɛndə(ʊ)'θi:lɪəm ]
■ noun the layer of cells lining the blood vessels, heart, and other organs and cavities of the body, and formed from the embryonic mesoderm. Compare with epithelium .
Derivatives
endothelial adjective
Origin
C19: mod. L., from endo- + Gk thēlē 'nipple'.