chirality axis

https://doi.org/10.1351/goldbook.C01059
An axis about which a set of @[email protected] is held so that it results in a spatial arrangement which is not superposable on its mirror image. For example with an allene abC=C=Ccd the @[email protected] axis is defined by the C=C=C bonds; and with an ortho-substituted biphenyl the atoms C-1, C-1', C-4 and C-4' lie on the @[email protected] axis.
Source:
PAC, 1996, 68, 2193. (Basic terminology of stereochemistry (IUPAC Recommendations 1996)) on page 2203 [Terms] [Paper]