Endothelium
Pronunciation : En`do*the"li*um
Part of Speech : n.;
Etymology : [NL., fr. Gr. (Anat.)
Definition : Defn: The thin epithelium lining the blood vessels, lymphatics, and serous cavities. See Epithelium.
pl. Endothelia.
Source : Webster's Unabridged Dictionary, 1913