mesopneumonAn obsolete term that formerly dignified the portions of the visceral pleura that invest the root of the lung proximally, anteriorly and posteriorly, and which is contiguous with the mediastinal pleura.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
mesopneumon(mĕs″ō-nū′mŏn) [″ + pneumon, lung]
Meeting point of two pleural layers at the hilus of the lung.
Medical Dictionary, © 2009 Farlex and Partners