What is stain?

Stain

A stain is a discoloration that can be clearly distinguished from the surface, material, or medium it is found upon. They are caused by the chemical or physical interaction of two dissimilar materials. Staining is used for biochemical research, metal staining, and art (e.g., wood staining, stained glass).

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Famous quotes containing the word stain:

    It is extraordinary how the house and the simplest possessions of someone who has been left become so quickly sordid.... Even the stain on the coffee cup seems not coffee but the physical manifestation of one’s inner stain, the fatal blot that from the beginning had marked one for ultimate aloneness.
    Coleman Dowell (1925–1985)

    She comes to meet death,
    To stain the altar of the goddess,
    To hold her girl-throat
    Toward the knife-thrust.
    Hilda Doolittle (1886–1961)

    There is rust in my mouth,
    the stain of an old kiss.
    Anne Sexton (1928–1974)