noun \-ˈthē-lē-əm\
plural me·so·the·lia \-lē-ə\

Definition of MESOTHELIUM

: epithelium derived from mesoderm that lines the body cavity of a vertebrate embryo and gives rise to epithelia (as of the peritoneum, pericardium, and pleurae), striated muscle, heart muscle, and several minor structures
me·so·the·li·al \-lē-əl\ adjective

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