melainotype
/mɪˈlʌɪnə(ʊ)tʌɪp/ /mɪˈleɪnə(ʊ)tʌɪp/Photography
noun
A collodion photograph on either glass or metal, especially one on glass that has to be viewed against a dark background.
Origin
Mid 19th century; earliest use found in Porter's Spirit of Times. From ancient Greek μελαίνειν to turn black + -o- + -type.