Fluorescence in situ hybridization (FISH) is a technique used in molecular biology to detect and localize specific DNA sequences on chromosomes. However, there are several synonyms for this term, including molecular cytogenetics, in situ hybridization (ISH), and fluorescent in situ hybridization. Other related terms include chromosome painting, chromosome mapping, and genetic mapping. These techniques are all utilized to study genetic material and identify and locate specific genes or chromosomal aberrations. Regardless of the specific terminology used, the goal remains the same: to better understand the genetic basis of disease and potentially develop new treatments or cures.