The posterior recess of the tympanic membrane, known as the recessus membranae tympani posterior, is an anatomical feature of the ear. It is a small, specialized area located behind the tympanic membrane. While there are no direct synonyms for this specific term, it can be referred to in different ways to enhance understanding. Some alternative expressions include "posterior tympanic membrane recess", "membranous recess at the back of the eardrum", or simply "rear cavity of the tympanic membrane". These alternative phrases effectively convey the same meaning as the original term, allowing for clearer communication about this specific anatomical part.