| 释义 |
polysymmetrical, a.|ˌpɒlɪsɪˈmɛtrɪkəl|
[f. poly- + symmetrical.]
Symmetrical about several planes of division; chiefly Bot., divisible into exactly similar halves by two or more different planes, as a regular flower; actinomorphous. Hence polysyˈmmetrically adv.; polyˈsymmetry, the condition of being polysymmetrical.
1875Bennett & Dyer Sachs' Bot. 183 So-called ‘regular’ flowers, stems with alternating whorls, and most roots, are polysymmetrical. Ibid. 533 If..the parts are all arranged in whorls, they are usually distributed monosymmetrically or polysymmetrically on the receptacle. Ibid. 184 The same relationship occurs between polysymmetry and multilateral arrangement as between monosymmetry and bilateral arrangement; polysymmetry must also be considered only as a particular case of the multilateral structure. |