Word: sphenoidal
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...divided into the bones of the cranium and of the face. The face bones are not to be considered in the discussion of this operation. The bones of the cranium form the brain case. They are the occipital, the two parietals, the frontal, the two temporals, the sphenoid (wedge-formed) and the ethmoid (sieve-formed). At birth these bones are not completely joined, the jointure being fulfilled by membranes, which change into bone as the person grows older...