| zygodactyl | (adjective) (of bird feet) having the first and fourth toes directed backward the second and third forward | - |
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| zygomatic | (adjective) of or relating to the cheek region of the face | - |
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| zygomorphic | (adjective) capable of division into symmetrical halves by only one longitudinal plane passing through the axis | Synonyms: bilaterally symmetrical, zygomorphous |
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| zygomorphous | (adjective) capable of division into symmetrical halves by only one longitudinal plane passing through the axis | Synonyms: bilaterally symmetrical, zygomorphic |
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| zygotic | (adjective) of or relating to a zygote | - |
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