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Related to acquired pellicle: materia alba
a thin scum forming on the surface of liquids.
acquired pellicle a colorless acellular bacteria-free film composed of salivary glycoproteins, deposited on the teeth within minutes after eruption or cleaning.
a thin film (about 1 mcm), derived mainly from salivary glycoproteins, that forms over the surface of a cleansed tooth crown when it is exposed to the saliva.