pericardial villi

per·i·car·di·al vil·li

[TA]
minute filiform projections (synovial villi) from the surface of the serous pericardium.
Synonym(s): villi pericardiaci [TA]

pericardial villi

An obsolete term for:
(1) Papillary folds of the pericardial mesothelium. 
(2) Threadlike strands of tissue projecting from the pericardium in serofibrinous or other forms of chronic pericarditis.