Aonian \A*o"ni*an\ ([asl]*[=o]"n[i^]*an), a. [From Aonia, a part of B[oe]otia, in Greece.] Pertaining to Aonia, in B[oe]otia, 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.