Stain (disambiguation)

A stain is an unwanted localized discoloration, often in fabrics or textiles.

Stain or Stains may also refer to:

• Wood stain, a type of penetrative dye used to create a wanted color change in wood
• Staining, in biology, a stain used to highlight features of tissue or cells
• A stain (heraldry), or one of a few non-standard tinctures used in modern heraldry

https://en.wikipedia.org/wiki/Stain_(disambiguation)