Found 2 items, similar to sphenoid bone.
English → English (WordNet) Definition: sphenoid bone sphenoid bone n : butterfly-shaped bone at the base of the skull [syn: sphenoid, os sphenoidale]
English → English (gcide) Definition: Sphenoid bone Sphenoid \Sphe"noid\, a. [Gr. ???; sfh`n a wedge + e'i^dos form: cf. F. sph['e]no["i]de.] 1. Wedge-shaped; as, a sphenoid crystal. [1913 Webster] 2. (Anat.) Of or pertaining to the sphenoid bone. [1913 Webster] 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. [1913 Webster]