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Meaning of ACTINOID

Pronunciation:  'aktu`noyd

WordNet Dictionary
 
 Definition: 
  1. [n]  any of a series of radioactive elements with atomic numbers 89 through 103
  2. [adj]  having a radial form; "starfish are actinoid--that is, they are radially symmetrical"
 
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 Synonyms: actinide, actinomorphic, actinomorphous, actinon
 
 See Also: group, grouping

 

 

Webster's 1913 Dictionary
 
 Definition: 
\Ac"tin*oid\, a. [Gr. ?, ?, ray + -oid.]
Having the form of rays; radiated, as an actinia.
 
Biology Dictionary
 
 Definition: Any element in the periodic table which has an atomic number between 89 and 103.
 

 

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