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1. Oxford Dictionary

   geometrical isomer

   • n.
     each of two or more compounds which differ from each other in the arrangement of groups with respect to a double bond, ring, or other rigid structure.

   • noun: geometrical isomer, plural noun: geometrical isomers

2. • 相關詞

   geometrical series

   • n.
     a series of numbers or quantities in geometric progression.

   Oxford Dictionary