Found 2 items, similar to Sphenoid.
English → English (WordNet) Definition: sphenoid sphenoid n : butterfly-shaped bone at the base of the skull [syn: sphenoid bone , os sphenoidale]
English → English (gcide) Definition: Sphenoid 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] Sphenoid \Sphe"noid\, n. 1. (Crystallog.) A wedge-shaped crystal bounded by four equal isosceles triangles. It is the hemihedral form of a square pyramid. [1913 Webster] 2. (Anat.) The sphenoid bone. [1913 Webster]