\As"per*gill\, Aspergillum \As`per*gil"lum\, n. [LL.
aspergillum, fr. L. aspergere. See {Asperse}, v. t.]
1. The brush used in the Roman Catholic church for sprinkling
   holy water on the people. [Also written aspergillus.]
2. (Zo["o]l.) See {Wateringpot shell}.