Synonym for flaccid part of tympanic membrane ... Triangular loose part of tympanic membrane between the malleolar folds. ... Synonym: pars flaccida membranae tympani, flaccid membrane, membrana flaccida, Rivinus' membrane, Shrapnell's membrane. ... (05 Mar 2000) ... Found on http://www.encyclo.co.uk/local/20973