the tangible substance that goes into the makeup of a physical object

a substance used as a coating to protect or decorate a surface (especially a mixture of pigment suspended in a liquid); dries to form a hard coating

(chemistry) a substance that changes color to indicate the presence of some ion or substance; can be used to indicate the completion of a chemical reaction or (in medicine) to test for a particular reaction

a substance used to treat leather or other materials before dyeing; aids in dyeing process

a usually soluble substance for staining or coloring e.g. fabrics or hair

a substance that colors or dyes