Noun
Giemsa (uncountable)
(genetics) A complex of stains used to investigate chromosomes; a mixture of eosin and methylene blue in glycerol and methanol.
Karyogram of human male using Giemsa staining, showing the classic metaphase chromatin structure. Source: Internet
Staining a cell with a dye such as Giemsa stain or crystal violet allows a microscopist to describe its size, shape, internal and external components and its associations with other cells. Source: Internet