| a. | 1. | (Biol.) Symmetrical bilaterally; - said of organisms, or parts of organisms, capable of division into two symmetrical halves only in a single plane. |
| Adj. | 1. | zygomorphic - capable of division into symmetrical halves by only one longitudinal plane passing through the axis Synonyms: bilaterally symmetrical, zygomorphous Antonyms: actinomorphic, actinomorphous - capable of division into symmetrical halves by any longitudinal plane passing through the axis |
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