<anatomy> Sphenoid bone, an irregularly shaped bone in front of the occipital in the base of the skull of the higher vertebrates. It is composed of several foetal bones which become united the adult. See Alisphenoid, Basisphenoid, Orbitosphenoid, Presphenoid.
Origin: Gr.; a wedge + form: cf. F. Sphenoide.
(01 Mar 1998)
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