ABSY´RTIDES or APSY´RTIDES(Ἀψυρτίδες: Eth. Ἀψυρτεύς, Ἄψυρτος: Chersoand Osero), the name of two islands off the coast of Illyricum, so called because, according to one tradition, Absyrtus was slain here by his sister Medea and by Jason. Ptolemy mentions only one island APSORRUS(Ἄψορρος), on which he places two towns Crepsa (Κρέψα) and Apsorrus. (Strab. p. 315; Steph. Byz. s. v.;Mel. 2.7; Plin. Nat. 3.26; Ptol. 2.16.13.)