αὐτάδελφος
English (LSJ)
ον (η, ον Sch.E.Hec.944)
A brother's or sister's, αἷμα A.Th.718, Eu.89; αὐ. Ἰσμήνης κάρα S.Ant.1. II Subst., one's own brother or sister, ib.503,696:—later αὐτ-αδέλφη, ἡ, Sch.E.Ph.135.
ον (η, ον Sch.E.Hec.944)
A brother's or sister's, αἷμα A.Th.718, Eu.89; αὐ. Ἰσμήνης κάρα S.Ant.1. II Subst., one's own brother or sister, ib.503,696:—later αὐτ-αδέλφη, ἡ, Sch.E.Ph.135.