Term Name:	auditory bulla
Synonyms:	auditory bullae, bulla, bulla tympanica, sigmoid process, tympanic bulla
Definition:	A hollow bony structure on the ventral, posterior portion of the skull of placental mammals that encloses parts of the middle and inner ear. In most species, it is formed by the tympanic part of the temporal bone.
Ontology:	Uberon Ontology [UBERON:0008959]