μνημονικόν
From LSJ
Ἄξιόν ἐστι τὸ ἀρνίον τὸ ἐσφαγμένον λαβεῖν τὴν δύναμιν καὶ τὸν πλοῦτον καὶ σοφίαν καὶ ἰσχὺν καὶ τιμὴν καὶ δόξαν καὶ εὐλογίαν → Worthy is the Lamb that was slain to receive power, and riches, and wisdom, and strength, and honour, and glory, and blessing
Russian (Dvoretsky)
μνημονικόν: τό (sc. τέχνημα)
1 искусство запоминания и воспоминания, мнемоника Plat.;
2 pl. сила памяти, способность запоминания и воспоминания Plat.