presphenoid
/priːˈsfiːnɔɪd/Zoology and Anatomy
noun
A bone of the floor of the cranium, anterior to the sphenoid bone.
adjective
Situated anterior to the sphenoid; of or designating the presphenoid.
Origin
Mid 19th century; earliest use found in Philosophical Transactions of the Royal Society of London. From pre- + sphenoid.