From Smith's Dictionary of Greek and Roman Biography and Mythology (London, 1880)
ACE'SIUS ('Akesios), a surname of Apollo; under which he was worshipped in Elis, where he had a splendid temple in the agora. This surname, which has the same meaning as akestor and alezikakos, characterised the god as the averter of evil. (Paus. vi. 24. § 5.)
An original e-text for everything2. I scanned, OCR'd, formatted, and linked this text - it is not available in any format on any other web site. All Greek words are transliterated into Latin characters.