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1. Oxford American Dictionary

   radial symmetry

   • IPA[ˌrādēəl ˈsimətrē]

   • n.
     symmetry around a central axis, as in a starfish or a tulip flower

   • noun: radial symmetry

2. • 釋義

   n.

   名詞

   • 1. symmetry around a central axis, as in a starfish or a tulip flower starfish have a fivefold radial symmetry