'Sphenoid bone' definitions:
Definition of 'sphenoid bone'
(from WordNet)
noun
Butterfly-shaped bone at the base of the skull [syn: sphenoid bone, sphenoid, os sphenoidale]
Definition of 'Sphenoid bone'
From: GCIDE
- 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]