From Smith's Dictionary of Greek and Roman Biography and Mythology (London, 1880)
ACE'RATUS('Akeratos grammatikos), a Greek grammarian, and the author of an epigram on Hector in the Greek Anthology. (vii. 138.) Nothing is known of his life.
P. S.
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.