Definition of fuchsin in English:

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Pronunciation: /ˈfyo͞oksən/ Pronunciation: /-ˌsēn/
(also fuchsine)


A deep red synthetic dye used as a biological stain and disinfectant.
  • A chloride of rosaniline; chemical formula: C20H20N3Cl.
Example sentences
  • Serial 3 m sections were stained with 1% aqueous acid fuchsin, and counter-stained with 0.05% toluidine blue.
  • Sections were also stained with Luna's aldehyde fuchsin as well as with orcein for observation and quantification of elastic fibers.
  • Schiff reagent is formed by the reaction of basic fuchsin with sulfurous acid.


Mid 19th century: from German Fuchs 'fox', translating French Renard (the name of the chemical company that first produced fuchsin commercially) + -in1.

For editors and proofreaders

Syllabification: fuch·sin

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