interlobular septum

in·ter·lob·u·lar sep·tum

the connective tissue between secondary pulmonary lobules, usually containing a vein and lymphatics; seen radiographically when thickened as a Kerley B or septal line.
Farlex Partner Medical Dictionary © Farlex 2012
References in periodicals archive ?
The normal interlobular septum is approximately 0.1 mm in thickness and is occasionally visible on normal scans.