A.in orderly manner, regularly, “ποιεῖν τι” X.Oec.8.3; “ἄρχεσθαι” Pl.Lg.700d; “πολιτεύεσθαι” Isoc.8.49; “παραθεῖναι κἀφελεῖν” Sosip.1.48.
2. Math. in Conics, ordinate-wise, κατάγειν, ἀνάγειν, hence ἡ τεταγμένως the ordinate, Apollon.Perg.Con. 1 Def.4, al., cf. Archim.Aequil.2.