varnish(redirected from oil varnish)
Also found in: Dictionary, Thesaurus, Encyclopedia.
A solution of gums and resins in a solvent. When these are applied to a surface, the solvent evaporates and leaves a hard, more or less flexible film. In dentistry, varnishes are used to protect sensitive tooth areas such as the pulp. Synonym: cavity varnish
Medical Dictionary, © 2009 Farlex and Partners