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).
Read more about Stain: Types of Stains, Formation, Properties, Removal
Famous quotes containing the word stain:
“The nightingales are singing near
The Convent of the Sacred Heart,
And sang within the bloody wood
When Agamemnon cried aloud,
And let their liquid siftings fall
To stain the stiff dishonored shroud.”
—T.S. (Thomas Stearns)
“As for me, Abraham, Isaac, and Jacob are now only the subtlest imaginable essences, which would not stain the morning sky.”
—Henry David Thoreau (1817–1862)
“Then suddenly the noon turns afternoon
And afternoon like an ill-written page
Will fade, until the very stain of light
Gathers in all the venom of the night
The equilibrium of the thirtieth age.”
—Allen Tate (1899–1979)