A.practising the same art, τινι with one, Pl.La.187a.
II. as Subst., fellow-workman, Hdt.2.89, Pl.Prt.328a, Xenarch.7.15 ; “ὁ ὁ. τινός” Pl. Chrm.171c, cf. D.22.58, Aristaenet.1.19 ; “οὐδεὶς τῶν ὁ. μου” Alex. 173.7 : as title applied to the good physician, Hp.Praec.7.