pinna Pinna • pinnace · · · Info · Definitions · Synonyms · Characters · · pinna · · Text Latin · · Script 5 · · Length Definitions · · · (noun) division of a usually pinnately divided leaf. Synonyms: pinnule. · · Noun Definition 1 (noun) the externally visible cartilaginous structure of the external ear. Synonyms: auricle, ear. · · Noun Definition 2 Synonyms · · · pinnule · · Synonym 1 auricle · · Synonym 2 ear · · Synonym 3 Characters · · a latin small letter a U+0061 i latin small letter i U+0069 n latin small letter n U+006E p latin small letter p U+0070