Definition of "Pigment" :

noun: 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

"Artists use paint' and pigment' interchangeably."

noun: dry coloring material (especially a powder to be mixed with a liquid to produce paint, etc.)

noun: any substance whose presence in plant or animal tissues produces a characteristic color

verb: color or dye with a pigment

"Pigment a photograph."

verb: acquire pigment; become colored or imbued