9 Grammatical Pitfalls
early 15c., medical Latin, from Greek pleura "side of the body, rib," also "flank of an army, page of a book," of unknown origin.
pleura pleu·ra (plur'ə)
n. pl. pleu·rae (plur'ē)
The thin serous membrane that envelops each lung and folds back to make a lining for the chest cavity.