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actinoid
actinoid
/ˈækˌtɪnɔɪd/
adjective
Having a radial form
(
actinoid
)
having a radial form
Starfish are actinoid--that is, they are radially symmetrical
starfish are actinoid--that is, they are radially symmetrical
noun
Any of a series of radioactive elements with atomic numbers 89 through 103
(
actinide
,
actinoid
,
actinon
)
any of a series of radioactive elements with atomic numbers 89 through 103
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