stain：释义

To discolor, soil, or spot.

To bring into disrepute; taint or tarnish.

To color (glass, for example) with a coat of penetrating liquid dye or tint.

To treat (specimens for the microscope) with a reagent or dye that makes visible certain structures without affecting others.

To produce or receive discolorations.

A discolored or soiled spot or smudge.

A blemish on one's moral character or reputation.

A liquid substance applied especially to wood that penetrates the surface and imparts a rich color.

A reagent or dye used for staining microscopic specimens.