sacral promontory(redirected from promontorium ossis sacri)
the most prominent anterior projection of the base of the sacrum.
a projecting process or eminence.
middle ear promontory
a bulge in the medial wall of the middle ear overhanging the cochlea.
in the midline of the ventral surface of the lumbosacral junction, a lip at the junction of the cranial extremity of the sacrum with its ventral surface, an easily recognized prominence of the roof of the pelvic cavity.