| thioflavin T | A yellow thiazole dye, C17H19N2SCl, used in histopathology as a fluorochrome for hyaline and amyloid. (05 Mar 2000) |
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| thioflavine S | A methylated and sulfonated derivative of primulin; a yellowish dye used in fluorescence microscopy as a vital stain. (05 Mar 2000) |
| thioflavine T stain | <technique> A stain employed to detect amyloid, which induces specific yellow fluorescence; tissue sections are first put in alum-haematoxylin to quench nuclear fluorescence and then stained in thioflavine T. (05 Mar 2000) |