n.
Pronunciation: ' plu ̇ r- ə
Function: noun
Inflected Form: plural pleu · rae \ ' plu ̇ r- ˌ ē , - ˌ ī \ or pleuras
Etymology: Middle English, from Medieval Latin, from Greek, rib, side
Date: 15th century
: the delicate serous membrane that lines each half of the thorax of mammals and is folded back over the surface of the lung of the same side
– pleu · ral \ ' plu ̇ r- ə l \ adjective