basisphenoid

1 of 2

adjective

ba·​si·​sphe·​noid ˌbā-səs-ˈfē-ˌnȯid 

variants also basisphenoidal

-səs-fi-ˈnȯid-ᵊl 

: relating to or being the part of the base of the cranium that lies between the basioccipital and the presphenoid bones and that usually ossifies separately and becomes a part of the sphenoid bone only in the adult

basisphenoid

2 of 2

noun

: the basisphenoid bone