Term: pleura(n), plural pleurae
Literally meaning: "side"
Origin: Anc Greek
πλευρόν/πλευρόν(=a rib, lateral part of the body)
The term coined by Galen in order to describe a bundle on nerves
Pleura is the serous membrane lining the thoracic cavity and lungs (visceral and parietal pleurae accordingly).