Lewis Short
thĕristrum (noun N) = θέριστρον,:
* A summer garment.
* Lit. (late Lat.), Hier. in Isa. 2, 3, 23; Vulg. Gen. 38, 14.
* Trop., a garment, covering: theristrum pudicitiae,Hier. Ep. 107, 7.
Charlton T. Lewis, Charles Short, A Latin Dictionary