actinoid   (TTS Sound)

The actinoid has 2 Senses.

• actinoid, actinon, actinide
• アクチノイド
• any of a series of radioactive elements with atomic numbers 89 through 103
• 原子番号89から103の一連の放射性元素のどれか

• actinoid
• having a radial form; "starfish are actinoid--that is, they are radially symmetrical"
• 放射形を持つさま