Synonym for false membrane ... <dermatology> A thick, tough fibrinous exudate on the surface of a mucous membrane or the skin, as seen in diphtheria. ... Synonym: croupous membrane, neomembrane, plica, pseudomembrane. ... (05 Mar 2000) ... 
(ne″o-mem´brān) pseudomembrane.
neomembrane A new, or false, membrane.