Overview of noun actinoid

The noun actinoid has 1 sense

• actinoid, actinide, actinon -- (any of a series of radioactive elements with atomic numbers 89 through 103)

Overview of adj actinoid

The adj actinoid has 1 sense

• actinoid -- (having a radial form; "starfish are actinoid--that is, they are radially symmetrical")