acetocarmine
/ˌasɪtəʊˈkɑːmʌɪn/ /əˌsiːtə(ʊ)ˈkɑːmʌɪn/Biology
noun
A staining solution for microscopy consisting of carmine in concentrated acetic acid, sometimes with the addition of ferric chloride.
Origin
Late 19th century. From aceto- + carmine adjective.