Lysochrome refers to a type of synthetic dye that selectively stains lipids, allowing for the visualization of fat-containing tissues under a microscope. These dyes are often used in histology and pathology to highlight lipid accumulation in cells, which can be important for diagnosing various diseases. Lysochromes are particularly useful in studying conditions related to metabolic disorders and certain types of tumors. Examples of lysochromes include Sudan dyes and Oil Red O.