| Term | acid |
| Pronunciation | AS-id |
| See also | acid etch, acid-etched bridge |
| Definition | A chemical compound that releases hydrogen ions when dissolved in water. Acids have a pH value less than 7. Used in the laboratory to clean oxide layers and surface contaminants from precious metals, and to etch non-precious metals and porcelain. Also used to etch tooth enamel. |
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