before vowels pleur-, word-forming element meaning "pertaining to the side; pertaining to the pleura," from Greek pleura "the side, the ribs" (see pleura).
Entries linking to pleuro-
pleura n.
"sereus membrane lining the chest cavity," early 15c., from medical Latin, from Greek pleuron "a rib," in plural, pleura, "the ribs, side of the body," also "flank of an army, page of a book," a word of unknown origin.