actinoid

Từ điển WordNet v3.1 - WordNet Dictionary

I - noun

any of a series of radioactive elements with atomic numbers 89 through 103
• Syn:
actinide, actinon
• Hypernyms:
group, grouping

II - adjective

having a radial form
- starfish are actinoid--that is, they are radially symmetrical
• Similar to:
actinomorphic, actinomorphous

• Từ đồng nghĩa / Synonyms:
  actinide, actinon