| Fontana-Masson silver stain | <technique> A stain used to demonstrate melanin and argentaffin granules. Synonym: Fontana-Masson silver stain. (05 Mar 2000) |
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| fused silver nitrate | Silver nitrate mixed with silver chloride and allowed to dry. Usually applied to the ends of small wooden applicator sticks or made available as pencils. These are used after wetting as a caustic chemical for the removal of warts. Synonym: fused silver nitrate, lunar caustic. (05 Mar 2000) |