Syrma

·noun A long dress, trailing on the floor, worn by tragic actors in Greek and Roman theaters.

syrma
syrma, ae, f. (neutr., Juv. 8, 229; Sen. Herc. Fur. 474), = σύρμα. I A robe with a train , Sen. Oe...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.
syrma
syrma atis, n , σύρμα, a robe with a train, tragic robe (to add to the actor's apparent stature), I...

An Elementary Latin Dictionary