a. Phys. [f. prec. + -AL.] Pertaining to the wings of the sphenoid bone.
1849–52. Todd, Cycl. Anat. & Phys., IV. 1298/1. Alisphenoidal … air-cells.
1866. Huxley, Preh. Rem. Caithn., 153. If alisphenoidal synostosis is the cause of the frontal depression of the Neanderthal skull.
