as·per·gil·lum (ās'pər-jĭl'əm) n.
pl.as·per·gil·la (-jĭl'ə) or as·per·gil·lumsRoman Catholic Church An instrument, such as a brush or a perforated container, used for sprinkling holy water.
[New Latin, from Latin aspergere, to sprinkle; see asperse.]