Posterior clinoid process - Processus clinoideus posterior
The posterior boundary of the superior surface of sphenoid bone is formed by a square-shaped plate of bone, the dorsum sellæ; ending at its superior angles in two tubercles, the posterior clinoid processes, the size and form of which vary considerably in different individuals. The posterior clinoid processes deepen the sella turcica, and give attachment to the tentorium cerebelli.
This definition incorporates text from a public domain edition of Gray's Anatomy (20th U.S. edition of Gray's Anatomy of the Human Body, published in 1918 – from http://www.bartleby.com/107/).
General Anatomy > Bones; Skeletal system > Axial skeleton > Cranium > Sphenoid bone > Body of sphenoid bone > Sella turcica > Posterior clinoid process