I. ˈplu̇rə, ˈplürə noun
( plural pleu·rae -ˌrē, -ˌrī ; or pleuras )
Etymology: Medieval Latin, from Greek, side, rib — more at pleurisy
1.
a. : either of a pair of two-walled sacs of serous membrane each lining one lateral half of the thorax, having an inner layer closely adherent to the corresponding lung, reflected at the root of the lung to form a parietal layer that adheres to the walls of the thorax, the pericardium, upper surface of the diaphragm, and adjacent parts, and containing a small amount of serous fluid that minimizes the friction of respiratory movements
b. : the membranous tissue making up the pleurae
2.
[New Latin, from Greek]
: a laterally located body part ; specifically : pleuron
II.
plural of pleuron
or of pleurum