AONIAN a.
Pertaining to Aonia, Boeotia, or to the Muses, who were supposed to dwell there. Aonian fount, the fountain of Aganippe, at the foot of Mount Helicon, not far from Thebes, and sacred to the Muses.
APEX n.
The tip, top, point, or angular summit of anything; as, the apex of a mountain, spire, or cone; the apex, or tip, of a leaf.