sphenoid Meaning, Definition & Usage

  1. noun butterfly-shaped bone at the base of the skull
    os sphenoidale; sphenoid bone.

WordNet

Sphe"noid adjective
Etymology
Gr. a wedge + form: cf. F. sphénoïde.
Definitions
  1. Wedge-shaped; as, a sphenoid crystal.
  2. (Anat.) Of or pertaining to the sphenoid bone.
Sphe"noid noun
Definitions
  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.

Webster 1913