| stain | | |
| n. (attribute) | 1. discoloration, discolouration, stain | a soiled or discolored appearance.; "the wine left a dark stain" |
| ~ appearance, visual aspect | outward or visible aspect of a person or thing. |
| ~ scorch | a discoloration caused by heat. |
| ~ bloodstain | a discoloration caused by blood. |
| ~ iron mold, iron mould | a spot caused the staining with rust or ink. |
| ~ mud stain | a stain produced by mud. |
| ~ oil stain | a stain produced by oil. |
| ~ tarnish | discoloration of metal surface caused by oxidation. |
| n. (substance) | 2. stain | (microscopy) a dye or other coloring material that is used in microscopy to make structures visible. |
| ~ microscopy | research with the use of microscopes. |
| ~ crystal violet, gentian violet | a green crystal (violet in water) used as a dye or stain or bactericide or fungicide or anthelmintic or burn treatment. |
| ~ methylene blue, methylthionine chloride | a dark green dye used as a stain, an antiseptic, a chemical indicator, and an antidote in cyanide poisoning. |
| ~ coloring material, colour, colouring material, color | any material used for its color.; "she used a different color for the trim" |
| ~ counterstain | a stain of contrasting color that is used when the principal stain does not show the structure clearly. |
| n. (state) | 3. dirt, filth, grease, grime, grunge, soil, stain | the state of being covered with unclean things. |
| ~ dirtiness, uncleanness | the state of being unsanitary. |
| n. (communication) | 4. brand, mark, stain, stigma | a symbol of disgrace or infamy.; "And the Lord set a mark upon Cain" |
| ~ demerit | a mark against a person for misconduct or failure; usually given in school or armed forces.; "ten demerits and he loses his privileges" |
| ~ bend sinister, bar sinister | a mark of bastardy; lines from top right to bottom left. |
| ~ cloven foot, cloven hoof | the mark of Satan. |
| ~ symbol | an arbitrary sign (written or printed) that has acquired a conventional significance. |
| n. (act) | 5. blot, smear, smirch, spot, stain | an act that brings discredit to the person who does it.; "he made a huge blot on his copybook" |
| ~ error, fault, mistake | a wrong action attributable to bad judgment or ignorance or inattention.; "he made a bad mistake"; "she was quick to point out my errors"; "I could understand his English in spite of his grammatical faults" |
| v. (change) | 6. stain | color with a liquid dye or tint.; "Stain this table a beautiful walnut color"; "people knew how to stain glass a beautiful blue in the middle ages" |
| ~ dye | color with dye.; "Please dye these shoes" |
| ~ ebonise, ebonize | stain black to make it look like ebony. |
| ~ dip | stain an object by immersing it in a liquid. |
| ~ tattoo | stain (skin) with indelible color. |
| ~ marble | paint or stain like marble.; "marble paper" |
| ~ vein | make a veinlike pattern. |
| v. (change) | 7. stain | produce or leave stains.; "Red wine stains the table cloth" |
| ~ alter, change, modify | cause to change; make different; cause a transformation.; "The advent of the automobile may have altered the growth pattern of the city"; "The discussion has changed my thinking about the issue" |
| ~ smut | stain with a dirty substance, such as soot. |
| ~ blob, fleck, blot, spot | make a spot or mark onto.; "The wine spotted the tablecloth" |
| v. (contact) | 8. defile, maculate, stain, sully, tarnish | make dirty or spotty, as by exposure to air; also used metaphorically.; "The silver was tarnished by the long exposure to the air"; "Her reputation was sullied after the affair with a married man" |
| ~ blob, fleck, blot, spot | make a spot or mark onto.; "The wine spotted the tablecloth" |
| ~ darken | tarnish or stain.; "a scandal that darkened the family's good name" |
| v. (change) | 9. stain | color for microscopic study.; "The laboratory worker dyed the specimen" |
| ~ dye | color with dye.; "Please dye these shoes" |
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