Prelog is a term that refers to a specific type of chemical structure or configuration in organic chemistry. It is often associated with the study of stereochemistry, which examines how the spatial arrangement of atoms affects the properties and reactions of molecules. The concept of Prelog is named after the chemist Vladimir Prelog, who made significant contributions to the understanding of stereochemistry. His work helped establish the rules for determining the configuration of chiral molecules, which are essential in fields like pharmaceuticals and biochemistry.