ἅτερος

2. ἅτερος [α], Att. contr. for ὁ ἅτερος, Com.Adesp. 14.23 D., Pl. Lg. 695b, etc.; also neut. θάτερον, gen. θατέρου, dat. θατέρῳ, θατέρᾳ, or with mark of crasis, θἀτέρου, etc.; but contr. forms when the Art. ends with a conson., are incorrect, as θάτερον τὸν τόπον Str. 2.1.20, cf.Luc. DMort. 26.1, Hist.Conscr. 22: also nom. θάτερος Polem. Cyn. 4; ὁ θάτερος Men. 846; τὰ θάτερα Arist. Mu. 397a2; ἅτερον for τὸν ἕτερον Luc. Pseudol. 29. (sṃ-τερος; v. ἕτερος.)