a group of azo compounds used for staining fats. The group includes Sudan I, Sudan II, Sudan III, Sudan IV, and Sudan black.
a group of stains used for microscopical examination of blood cells, consisting of variable mixtures of thiazine dyes, such as azure B, with eosin. Romanowsky stains give characteristic staining patterns, on the basis of which blood cells are classified. The group includes the stains of Leishmann, Wright, May-Grünwald, Giemsa, etc. [D. L. Romanowsky (1861–1921), Russian physician]... romanowsky stains
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