n.
Pronunciation: ' sf ē - ˌ no ̇ id
Variant: or sphe · noi · dal \ sfi- ' no ̇ i-d ə l \
Function: adjective
Etymology: New Latin sphenoides, from Greek sph ē noeid ē s wedge-shaped, from sph ē n wedge
Date: 1732
1 : of, relating to, or being a winged compound bone of the base of the cranium
2 usually sphenoidal : having a wedged shape