coating

https://doi.org/10.1351/goldbook.15161
Technological process consisting of the application of a substance, which forms a layer (e.g., to protect the drug and/or the tablet, to mask taste, to control the rate of drug release (e.g., film coating, sugar coating).
Note: Sugar coating is used to mask bad taste without altering release profile.
Source:
PAC, 2009, 81, 971. (Glossary of terms related to pharmaceutics (IUPAC Recommendations 2009)) on page 979 [Terms] [Paper]