Relating to both the frontal bone of the forehead and the sphenoid bone deep in the center of the skull.
Compound of fronto- (Latin frons, 'forehead') and sphenoidal (from Greek sphenoeides, 'wedge-shaped'). The sphenoid bone is wedge-shaped and located at the skull's center, so this describes their anatomical relationship.
The sphenoid bone is sometimes called the 'seat of the pituitary gland' because it holds this crucial hormone-producing gland—the frontosphenoidal area is critical to surgeons operating on pituitary tumors!
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