Mol-ecules of the title compound, C(20)H(14)O(2), show approximate C(s) symmetry with the approximate mirror plane perpendicular to the central ring. The torsion angles about the acyclic bonds are 30.05 (15) and 30.77 (15)° in one half compared to -36.62 (14) and -18.60 (15)° in the other half of the mol-ecule. The central aromatic ring makes dihedral angles of 47.78 (4) and 51.68 (3)° with the two terminal rings.