Definitions

1. adjective

relating to or resembling the sphenoid bone, especially in shape or structure

“The sphenoidal sinus is a complex air cavity in the sphenoid bone.”

2. noun

a sphenoidal structure or feature

“The sphenoidal shape of the new building design was widely praised.”

3. adverb

in a sphenoidal manner or way

“The surgeon operated sphenoidally to repair the damaged bone.”