foramen petrosum

fo·ra·men pe·tro·'sum

[TA]
an occasional opening in the greater wing of the sphenoid bone, between the foramen spinosum and foramen ovale, which transmits the lesser petrosal nerve.
References in periodicals archive ?
Foramen Ovale is found alongside the foramen spinosum and the foramen petrosum. When present the foramen petrosum transmits the lesser petrosal nerve.