- A lung.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Examples from the Web for pulmo
Urtica marina includes both Anemones and certain Scyphomedusae (not Pulmo).Notes and Letters on the Natural History of Norfolk
This substance, which he says is like the Pulmo Marinus, he saw with his own eyes, the rest he learnt by report.