A bone in the floor of the mammalian cranium, in the region of the optic nerve. In the human skull it is represented by the lesser wings of the sphenoid bone.
- ‘The orbitosphenoids of S. crocodilurus were not studied or described by McDowell and Bogert.’
- ‘The lesser wings of the sphenoid are formed by the orbitosphenoids.’
- ‘The dorsal surface of the orbitosphenoid is flat, and supports part of the frontal lobe of the brain.’
- ‘The ptero- and orbitosphenoids may be joined in larger animals.’