A.not seen, not to be seen, Antipho Soph.67, D.S.2.35, Arist.Mu.399b22; “ἄγνωστος καὶ ἀ.” Procl.in Prm.p.799S.
2. not scientifically considered, “διαφοραί” Aristox.Harm.p.35 M.; “τὸ ἀ.” M.Ant.1.9 (prob.); οὐκ ἀ. not without considered meaning, J.BJ5.5.4.