Tumulus

·noun An artificial hillock, especially one raised over a grave, particularly over the graves of persons buried in ancient times; a barrow.

tumulus
tŭmŭlus, i, m. (late Lat. in the neutr.: HOC TVMVLVM, Inscr. Rein. cl. 20, 197) [tumeo; cf. also tum...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.
tumulus
tumulus ī, m 1 TV-, a heap of earth, mound, hill, hillock : terrenus, Cs.: ignis e speculā sublatu...

An Elementary Latin Dictionary