equatorial

  1. For the use of this term in the context of cyclohexane see axial, equatorial.
  2. For the use of this term in the context of a bipyramidal structure see apical, basal, equatorial.
    Source:
    PAC, 1996, 68, 2193 (Basic terminology of stereochemistry (IUPAC Recommendations 1996)) on page 2208