epithelium epitheliotoxin • epithelization · · · Info · Definitions · Synonyms · Characters · · epithelium · · Text Latin · · Script 10 · · Length Definitions · · · (noun) membranous tissue covering internal organs and other internal surfaces of the body. Synonyms: epithelial tissue. · · Noun Definition 1 Synonyms · · · epithelial tissue · · Synonym 1 Characters · · e latin small letter e U+0065 h latin small letter h U+0068 i latin small letter i U+0069 l latin small letter l U+006C m latin small letter m U+006D p latin small letter p U+0070 t latin small letter t U+0074 u latin small letter u U+0075