Atratus

Ātrātus, i, m.,

a small river in the vicinity of Rome , Cic. Div. 1, 43, 98 B. and K.

atratus
ātrātus adj. ater, clothed in black : plebes, Ta.: equi (of the sun), Pr. ...

An Elementary Latin Dictionary
atratus
ātrātus, a, um, P. a., as if from atro, āre [ater], clothed in black for mourning , dressed in mour...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.