• (n.) An epipterygoid bone or cartilage; the columella in the skulls of many lizards. • (a.) Situated upon or above the pterygoid bone.
Ep`ip·ter'y·goid adjective [ Prefix epi- + pterygoid .] (Anat.) Situated upon or above the pterygoid bone. -- noun An epipterygoid bone or cartilage; the columella in the skulls of many lizards.