ὀρχηστική
From LSJ
οὕτω τι βαθὺ καὶ μυστηριῶδες ἡ σιγὴ καὶ νηφάλιον, ἡ δὲ μέθη λάλον → silence is something profound and mysterious and sober, but drunkenness chatters
Russian (Dvoretsky)
ὀρχηστική: ἡ (sc. τέχνη) танцевальное искусство Polyb., Luc.
English (Woodhouse)
(see also: ὀρχηστικός) art of dancing