actinoid是什么意思？

actinoid

英['æktɪnɔɪd] 美['æktənɔɪd]

• adj. 放射线状的；

例句

• Starfish are actinoid -- that is, they are radially symmetrical. 海星呈放射性形状 —— 那就是说, 它们是呈对称的放射状.

英英词典释义

• Noun
  1. any of a series of radioactive elements with atomic numbers 89 through 103
• Adjective
  1. having a radial form;
  "starfish are actinoid--that is, they are radially symmetrical"