Petrosquamous fissure | definition of petrosquamous fissure by Medical dictionary
pet·ro·squa·mous fis·sure [TA]
a shallow fissure indicating externally the line of fusion of the petrous and squamous portions of the temporal bone.
References in periodicals archive
The cartilaginous portion of the eustachian tube is located in the petrosquamous fissure
of the temporal bone, which is near the occipital and sphenoid bones.