δυναμοδύναμις
From LSJ
μοχθεῖν τε βροτοῖσ(ιν) άνάγκη → and you mortals must endure trouble (Euripides' Hippolytus 208)
English (LSJ)
εως, ἡ, A square multiplied by square, fourth power, Hero Metr.1.17; fourth power of unknown quantity (x4), Dioph. Def.1 (pl.), al.: —hence δῠνᾰμο-δῠνᾰμοστόν, τό, the fraction 1/x4, Id.Def.3, al.
German (Pape)
[Seite 673] ἡ, das Quadrat des Quadrats, Diophant.
Greek (Liddell-Scott)
δῠναμοδύναμις: -εως, ἡ, δύναμις δυνάμεως, π.χ. τὸ τετράγωνον τοῦ τετραγώνου, Διόφαντ. 2.
Spanish (DGE)
-εως, ἡ
mat.
1 elevación a la cuarta potencia Hero Metr.1.17, Hippol.Haer.1.2.9, plu., Dioph.4.1.
2 potencia de potencia del número 81, cuadrado de 9, Anon.Prol.6.6.