A.skilled or practised in calculating, Pl.Tht.145a, X.Mem.1.1.7; “οἱ φύσει λ.” Pl.R.526b; of a mathematician, AP11.267: Subst. ἡ -κή (with or without τέχνη), practical arithmetic, the art of arithmetic, opp. ἀριθμητική (the science of number), Pl.Grg. 450d, 451b, R.525a, al.; so τὸ -“κόν” Id.Chrm.174b; ἡ λ., opp. γεωμετρία, Archyt.4.
II. endued with reason, rational, “ζῷα” Arist. de An. 434a7; [τὸ] λ. [μόριον τῆς ψυχῆς] ib.432a25; λ. ὄρεξις, opp. ἄλογος, Id.Rh.1369a2; τὸ λ. (sc. τῆς ψυχῆς) the reasoning faculty, Pl.R.439d, cf. Arist.Top.128b38; = τὸ βουλευτικόν, Id.EN1139a12.
2. using one's reason, reasonable, X.HG5.2.28, Men.Epit.541.