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actinoid

PRIMARY MEANINGS OF: actinoid

1
 n
any of a series of radioactive elements with atomic numbers 89 through 103
2
 adj
having a radial form
FULL DEFINITIONS OF: actinoid
1

n any of a series of radioactive elements with atomic numbers 89 through 103

Synonyms:
actinide, actinon
Type of:
group, grouping
any number of entities (members) considered as a unit
2

adj having a radial form

“starfish are actinoid--that is, they are radially symmetrical”
Synonyms
actinomorphic, actinomorphous
capable of division into symmetrical halves by any longitudinal plane passing through the axis
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