Hypertext Webster Gateway: "Sphenoid"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
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.
2. (Anat.) The sphenoid bone.
From Webster's Revised Unabridged Dictionary (1913) (web1913)
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.
2. (Anat.) Of or pertaining to the sphenoid bone.
{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}.
From WordNet (r) 1.7 (wn)
sphenoid
n : butterfly-shaped bone at the base of the skull [syn: {sphenoid
bone}, {os sphenoidale}]
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