Sphenoid bone (Anat.), an irregularly shaped bone in front of the occipital in the base of the skull of the higher vertebrates. It is composed of several fetal bones which become united the adult. See Alisphenoid, Basisphenoid, Orbitosphenoid, Presphenoid.
... their last examination, in a room fragrant with the amalgamated odours of stale tobacco-smoke, varnished bones, leaky preparations, and gin-and-water. Large anatomical prints depend from the walls, and a few vertebrae, a lower jaw, and a sphenoid bone, are ... — Punch, or the London Charivari, Vol. 1, December 18, 1841 • Various
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