| NOUN | substance | acid dye | dye in which the chromophore is part of a negative ion |
|---|
| Meaning | dye in which the chromophore is part of a negative ion. | |
|---|---|---|
| Narrower | metallized dye | acid dye in which the negative ion contains a chelated metal atom |
| Broader | dye, dyestuff | A usually soluble substance for staining or coloring e.g. fabrics or hair |
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