counterstain counterspying • counterstamp · · · Info · Definitions · Characters · · counterstain · · Text Latin · · Script 12 · · Length Definitions · · · (noun) a stain of contrasting color that is used when the principal stain does not show the structure clearly. · · Noun Definition 1 Characters · · a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 i latin small letter i U+0069 n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075