| noun | (histology) the use of a dye to color specimens for microscopic study |
| noun | the act of spotting or staining something |
| verb | color with a liquid dye or tint “Stain this table a beautiful walnut color” |
| verb | produce or leave stains “Red wine stains the table cloth” |
| verb | make dirty or spotty, as by exposure to air; also used metaphorically “The silver was tarnished by the long exposure to the air” |
| verb | color for microscopic study “The laboratory worker dyed the specimen” |
| stain | verb | color for microscopic study |
| spot | verb | make a spot or mark onto |
| maculate | verb | make dirty or spotty, as by exposure to air; also used metaphorically |
| stainer | noun | a worker who stains (wood or fabric) |
| stain | noun | the state of being covered with unclean things |
| tarnish | noun | discoloration of metal surface caused by oxidation |
| macula | noun | a patch of skin that is discolored but not usually elevated; caused by various diseases |
| maculation | noun | the act of spotting or staining something |
| staining | noun | (histology) the use of a dye to color specimens for microscopic study |