Organic crystal chemistry is a field of organic chemistry that deals with the study of crystalline solids and their properties. Synonyms for this term include crystal engineering, molecular solids, crystallography, and solid-state chemistry. Crystal engineering involves the design and synthesis of molecules that can form specific types of crystals. Molecular solids are nonmetallic solids that are made up of molecules held together by intermolecular forces. Crystallography is the study of crystals and their properties. Solid-state chemistry is the study of the properties of solids, such as their electronic and magnetic properties, and how they relate to their structures. These synonyms for organic crystal chemistry all deal with the study of crystalline solids and their properties.