the world > matter > colour > named colours > brown or brownness > colouring matter > [noun] > stains (7)
Copper calcined with brimstone or white vitriol, used to colour glass.
Used for walnut-juice n. at compounds 2.
a variety of brown used for colouring glass.
Phenyl-brown, used esp. as a staining matter for histological preparations.
the juice expressed from the green husk of the walnut; used by gipsies as a brown stain for the skin.