ἰσοδυναμία
From LSJ
καὶ οἱ ἀμαθέστατοι τῶν ἰατρῶν τὸ αὐτὸ σοὶ ποιοῦσιν, ἐλεφαντίνους νάρθηκας καὶ σικύας ἀργυρᾶς ποιούμενοι καὶ σμίλας χρυσοκολλήτους: ὁπόταν δὲ καὶ χρήσασθαι τούτοις δέῃ, οἱ μὲν οὐδὲ ὅπως χρὴ μεταχειρίσασθαι αὐτὰ ἴσασιν → the most ignorant of doctors do the same as you, getting themselves ivory containers, silver cupping instruments, and gold-inlaid scalpels; but when it's time to use those things, they haven't the slightest notion of how to handle them
English (LSJ)
ἡ,
A equal force or power, Ti.Locr.95b. 2 equivalence in meaning, A.D.Conj.244.17. 3 Astrol., equipollence, Ptol.Tetr.132, Vett.Val.296.11.
German (Pape)
[Seite 1264] ἡ, gleiche Macht, Bedeutung, Geltung; Tim. Locr. 95 c; Sp.