parasphenoid
/ˌparəˈsfiːnɔɪd/Zoology and Anatomy
noun
An unpaired, median, often dagger-shaped dermal bone on the undersurface of the cranium in many vertebrates.
adjective
Designating this bone; of or relating to this bone.
Origin
Mid 19th century; earliest use found in Proceedings of the Academy of Natural Sciences of Philadelphia. From para- + sphenoid.