Having a wedged shape.

(anatomy) The sphenoid bone. / (crystallography) A wedge-shaped crystal bounded by four equal isosceles triangles; the hemihedral form of a square pyramid.

plural of sphenoid

Synonym of sphenoid

A compound bone at the base of the skull behind the eyes.

plural of sphenoidal sinus

plural of sphenoid sinus

(anatomy) A paranasal sinus contained within the body of the sphenoid bone.

Alternative form of sphenoid sinus

plural of sphenoid bone