συναρχία

English (LSJ)

ἡ,

   A joint administration or government, τινων D.C.53.2; πρός τινα Id.47.7; περὶ τὰ στρατιωτικά Str.15.1.52.    II in pl., αἱ σ. the collective magistracy, Arist.Pol.1298a14, Aen.Tact.4.11, Anon. Hist. (FGrH160) p.887 J., IG7.15 (Megara, ii B.C.), 42(1).79 (Arcadian, found at Epid., ii B.C.), Decr.Aetol. ap. Eust.270.40, Plb.27.2.11, etc.: so in sg., SIG426.32 (Bargylia, found at Teos, iii B.C.), al., Str.5.3.2.