mesothelium
(mes‵ŏ-thē'lē-ŭm , mez‵ŏ-thē'lē-ŭm, mes‵ŏ-thē'lē-ă, mez‵ŏ-thē'lē-ă)
Plural: mesothelia
[meso- + thelium]
Epithelium derived from embryonic mesenchymal cells. Mesothelium forms the serous epithelia throughout the interior of the body.
mesothelial,
adj.