A.“δείον” PSI4.361.4 (iii B. C.), etc.), οντος, τό, neut. Subst., prop. part. of impers. δεῖ (q. v.):—that which is binding, needful, right, “μᾶλλον τοῦ δ.” X.Mem.4.3.8; “τὰ δ.” Th.1.22, etc.; “οὐδὲν τῶν δ. πράττοντες” Isoc.3.25; πρὸ τοῦ δ. before it be needful, S.Ph.891; ἐν δέοντι (sc. καιρῷ) in good time, E.Med.1277, Plu.Cim.17; “ἐν τῷ δ.” Hdt.2.159; “ἐς δέον ἐγεγόνεε” Id.1.119, cf. 186; “ἐς δ. πάρεστι” S.OT 1416, cf. Ant.386; “εἰς δ. λέγειν” D.4.14; εἰς τὸ δ. for needful purposes, or in case of need, “ἐς τὸ δ. χρῆσθαι” Hdt.2.173: hence of secret service, “εἰς τὸ δ. ἀπώλεσα” Ar.Nu.859 (parody of Pericles' εἰς τὸ δ. ἀνήλωσα Sch. ad loc.); “εἰς οὐδὲν δ. ἀναλίσκειν” D.3.28: so in pl., εἰς δέοντα ἀναλωθῆναι Andronic.Rhod.p.577 M.
δέον (written