\Or`bi*to*sphe"noid\, a. [Orbit + sphenoid.]
(Anat.)
Of or pertaining to the sphenoid bone and the orbit, or to
the orbitosphenoid bone. -- n. The orbitosphenoid bone, which
is situated in the orbit on either side of the presphenoid.
It generally forms a part of the sphenoid in the adult.