Potential space between the pleural membranes lining the chest cavity (parietal pleura) and covering the lungs (visceral pleura).
Note: In pathological conditions, fluid may accumulate in the pleural cavity, between the visceral and parietal pleura.
Source:
PAC, 2016, 88, 713. 'Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)' on page 793 (https://doi.org/10.1515/pac-2015-1202)