συμφωνιακός
From LSJ
Ποιητὴς, ὁπόταν ἐν τῷ τρίποδι τῆς Μούσης καθίζηται, τότε οὐκ ἔμφρων ἐστίν → Whenever a poet is seated on the Muses' tripod, he is not in his senses
English (LSJ)
ή, όν,
A of or for a choir: pueri symphoniaci, singing boys, Cic.Mil.21.55. II ἡ -κή, a variety of ὑοσκύαμος, Pall.Agr.11.12.8, Apul.Herb.4; ὑοσκύαμος -κή Hippiatr.22; cf. σύμφωνος 111.