Sphenoid

3 definitions found

From The Collaborative International Dictionary of English v.0.48 [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]

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  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]

From WordNet (r) 2.0 [wn]:

  sphenoid
       n : butterfly-shaped bone at the base of the skull [syn: {sphenoid
           bone}, {os sphenoidale}]