n.
Pronunciation: ˌ me-z ə - ˌ th ē -l ē - ' ō -m ə , ˌ m ē -, -s ə -
Function: noun
Inflected Form: plural -mas also -ma · ta \ -m ə -t ə \
Etymology: New Latin
Date: circa 1899
: a usually malignant tumor derived from mesothelial tissue (as that lining the peritoneum or pleura)