| An acid is typically a water-soluble, sour-tasting chemical compound. In common usage an acid is any substance that, when dissolved in water, gives a solution with a pH of less than 7. |
| •owl:Thing |
| •SpatioTemporalThing |
| •Endurant |
| •PhysicalEndurant |
| •AmountOfMatter |
| •Substance |
| •Chemical |
| •ChemicalCompound |
| •Acid |