Eosinophilic means "loves eosin", and refers to the staining of certain tissues, cells, or organelles after they been washed with eosin, a dye. Eosin is an acidic dye, thus the structure being stained is basic.Eosinophilic describes the appearance of cells and structures seen in histological sections which take up the staining dye, eosin. This is a bright pink dye that stains the cytoplasm of cells as well as extracellular proteins such as collagen.
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