Having the property of @C01058@. 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 @M03838@-compound is considered to be composed of two chiral parts of opposite @C01063@; 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 @C01063@, which is better called @E02072@. Others extend it to a @R05026@ assembly, which is better just called a @R05025@. Use of the term to describe molecular assemblies should be avoided.