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actinoid
 
Adjective actinoid has 1 sense
  1. actinoid - having a radial form; "starfish are actinoid--that is, they are radially symmetrical"
    Antonyms:     zygomorphic, bilaterally symmetrical, zygomorphous (indirect, via actinomorphic)
Noun actinoid has 1 sense
  1. actinoid, actinide, actinon - any of a series of radioactive elements with atomic numbers 89 through 103
    --1 is a kind of group, grouping
actinidia arguta actinidia chinensis actinidia deliciosa actinidia polygama actinidiaceae actiniopteris actinism actinium actinoid actinoid series actinolite actinomeris actinomeris alternifolia actinometer actinometric actinometrical actinometry

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