endothelium
en·do·the·li·um
noun \ˌen-də-ˈthē-lē-əm\ plural en·do·the·lia\-lē-ə\
Definition of ENDOTHELIUM
1
: an epithelium of mesodermal origin composed of a single layer of thin flattened cells that lines internal body cavities and the lumens of vessels
2
: the inner layer of the seed coat of some plants
— en·do·the·li·al \-lē-əl\ adjective
Origin of ENDOTHELIUM
New Latin, from end- + -thelium (as in epithelium)
First Known Use: 1872
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