| NOUN | substance | dichromic acid | the hypothetical acid (H2Cr2O7) from which dichromates are derived |
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| Meaning | The hypothetical acid (H2Cr2O7) from which dichromates are derived; known only in solution and in the form of dichromate salts. | |
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| Broader | acid | Any of various water-soluble compounds having a sour taste and capable of turning litmus red and reacting with a base to form a salt |
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