epithelium[ep′i t̸hē′lē əm]
nounpl. epitheliums or epithelia
Origin of epitheliumModern Latin ; from Classical Greek epi-, upon + thēlē, nipple: see female
nounpl. ep·i·the·li·a or ep·i·the·li·ums
Origin of epitheliumNew Latin epithēlium : epi– + Greek thēlē, nipple; see dhē(i)- in Indo-European roots.
(plural epitheliums or epithelia)
- (anatomy) A membranous tissue composed of one or more layers of cells which forms the covering of most internal and external surfaces of the body and its organs: internally including the lining of vessels and other small cavities, and externally being the skin.
Modern Latin epithēlium, from Ancient Greek ἐπί (epi, “on, atop, epi-”) + θηλή (thēlē, “nipple”).