noun, plural as·per·so·ri·a [as-per-sawr-ee-uh, -sohr-] /ˌæs pərˈsɔr i ə, -ˈsoʊr-/, as·per·so·ri·ums. Roman Catholic Church.
Examples from the Web for aspersorium
And those figures that moved about it, with censor and aspersorium, were as angels for tenderness and dignity and undoubted power.None Other Gods|Robert Hugh Benson
A brush or aspersorium, used for sprinkling holy water, was leaning against the wall.Under the Rose|Frederic Stewart Isham
The brush used for sprinkling is an aspergill (aspergillum), or aspersoir, and the vessel for this water an aspersorium.