ἰσοταχ-ής · isotach-ēs — LSJ
possessing equal velocity, Arist. Ph. 216a20, al., Plb. 10.44.9, Cleom. 2.1, Ph. 1.588; ἄτομοι Epicur. Ep. 1p.18U., Nat. 2.2; πλοῖα Ph. Bel. 73.21; τινι Arist. Ph. 240a8: generally, equally swift, νίκης κρίσις Epigr.Gr. 939.2 (Synnada). Adv. -χῶς Arist. Mech. 848a16, Sch. Epicur. Ep. 1p.8U.
uniform in rate, of the pulse, Gal. 8.459, Plb. 10.44.13, Str. 1.2.17. Adv. -χῶς Gal. 9.454.