Having the property of @[email protected] As applied to a molecule the term has been used differently by different workers. Some apply it exclusively to the whole molecule, whereas others apply it to parts of a molecule. For example, according to the latter view, a @[email protected]-compound is considered to be composed of two chiral parts of opposite @[email protected]; this usage is to be discouraged. In its application to an assembly of molecules, some restrict the term to an assembly in which all of the molecules have the same @[email protected], which is better called @[email protected] Others extend it to a @[email protected] assembly, which is better just called a @[email protected] Use of the term to describe molecular assemblies should be avoided.