Bailly
v. ἀτράφαξις.
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LSJ
υος, ἡ, orach, Atriplex rosea, Hp. Vict. 2.54, Thphr. HP 7.1.2, al., Dsc. 2.119, Gal. 6.633. (The correct form is implied by the compound ψευδατράφαξυς Ar. Eq. 630, cf. EM 565.17; other spellings are ἀδράφαξυς (ἁδρ- Eust. 539.5) Thphr. l.c., ἀνδράφαξυς Dsc. l.c., Hp. l.c., ἀτράφαξις v.l. Dsc. l.c., Gal. 11.843, cf. Hdn. Gr. 1.539, 2.49, 467.)
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)