actinoid

Noun · Adjective
Synonyms: actinideactinon

WordNet 3.0

Noun (1)

  1. any of a series of radioactive elements with atomic numbers 89 through 103Synonyms: actinideactinon

Adjective (1)

  1. having a radial form“starfish are actinoid--that is, they are radially symmetrical”
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Webster's Dictionary (GCIDE)

Actinoid \Ac"tin*oid\, a. [Gr. ?, ?, ray + -oid.] Having the form of rays; radiated, as an actinia. [1913 Webster]
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