to mark or discolour with patches of something that dirties: the dress was stained with coffee
2.
to dye with a penetrating dyestuff or pigment
3.
to bring disgrace or shame on: to stain someone's honour
4.
to colour (specimens) for microscopic study by treatment with a dye or similar reagent
5.
(intr) to produce indelible marks or discoloration: does ink stain?
—n
6.
a spot, mark, or discoloration
7.
a moral taint; blemish or slur
8.
a dye or similar reagent, used to colour specimens for microscopic study
9.
a solution or liquid used to penetrate the surface of a material, esp wood, and impart a rich colour without covering up the surface or grain
10.
any dye that is made into a solution and used to colour textiles and hides
[C14 steynen (vb), shortened from disteynen to remove colour from, from Old French desteindre to discolour, from des-dis-1 + teindre, from Latin tingere to tinge]
1382, probably representing a merger of O.N. steina "to paint" and an aphetic form of M.E. disteynen "to discolor or stain," from O.Fr. desteign-, stem of desteindre "to remove the color," from des- (from L. dis- "remove") + O.Fr. teindre "to dye," from L. tingere (see
tincture). The noun is from 1563. Stained glass is attested from 1791.
A reagent or dye that is used for staining microscopic specimens.
A procedure in which a dye or a combination of dyes and reagents is used to color the constituents of cells and tissues.
v.stained, stain·ing, stains To treat specimens for the microscope with a reagent or dye that makes visible certain structures without affecting others.