Tumulus
Pronunciation : Tu"mu*lus
Part of Speech : n.;
Etymology : [L., a mound, a sepulchral mound, probably from tumere to swell. Cf. Tumid.]
Definition : Defn: An artificial hillock, especially one raised over a grave, particularly over the graves of persons buried in ancient times; a barrow.
pl. Tumuli.
Source : Webster's Unabridged Dictionary, 1913