4. thesis, hypothesis, provisional ground, ὡς ἂν εἰ λέγοι λόγον
.....maintain a thesis, Pl. Prt.344b; ὑποθέμενος ἑκάστοτε λ. provis-
.....ionally assuming a proposition, Id.Phd.100a; τὸν τῆς ὁμοιότητος
.....λ. hypothesis of equivalence, Arist.Cael.296a20.

5. reason, ground, “πάντων γινομένων κατὰ τὸν λ. τόνδε”
.....Heraclit.1; “οὕτω βαθὺν λ. ἔχει” Id.45; ἐκ λόγου, opp. μάτην,
.....Leucipp. 2; “μέγιστον σημεῖον οὗτος ὁ λ.” Meliss.8; [ἐμπειρία]
.....οὐκ ἔχει λ. οὐδένα ὧν προσφέρει has no grounds for . . , Pl.Grg.
.....465a; μετὰ λόγου “τε καὶ ἐπιστήμης θείας” Id.Sph.265c; ἡ μετα
.....λόγου ἀληθὴς δόξα （῀ ἐπιστήμη) Id.Tht.201c; λόγον ζητοῦσιν
.....ὧν οὐκ ἔστι λ. proof, Arist. Metaph.1011a12;

6. formula (wider than definition, but freq. equivalent thereto), term
.....expressing reason, “λ. τῆς πολιτείας” Pl.R.497c; ψυχῆς οὐσία τε
.....καὶ λ. essential definition, Id.Phdr.245e; “ὁ τοῦ δικαίου λ.” Id.R.
.....343a; τὸν λ. τῆς οὐσίας ib.534b, cf. Phd.78d; “τὰς πολλὰς
.....ἐπιστήμας ἑνὶ λ. προσειπεῖν” Id.Tht.148d; ἐπὶ τῶν σχημάτων λ.
.....κοινός generic definition, Id.de An.414b23; ἀκριβέστατος λ.
.....specific definition, Id.Pol.1276b24; τὸ ᾠὸν οὔτε ἀρχῆς ἔχει λ.
.....fulfils the function of . . , Plu.2.637d; λ. τῆς μίξεως formula, i. e.
.....ratio of combination, Arist.PA642a22, cf. Metaph.993a17.