adjectiveDate: 1875 of a flower having floral parts unequal in size or form so that the flower is capable of division into essentially symmetrical halves by only one longitudinal plane passing through the axis • zygomorphynoun
Zygomorphic Zyg`o*mor"phic, Zygomorphous Zyg`o*mor"phous, a. [Gr. ? a yoke + ? form.] (Biol.) Symmetrical bilaterally; -- said of organisms, or parts of organisms, capable of division into two symmetrical halves only in a single plane.