Actinoid

[æktinɒid]

(noun.) any of a series of radioactive elements with atomic numbers 89 through 103.

(adj.) having a radial form; 'starfish are actinoid--that is, they are radially symmetrical' .

Inputed by Clinton--From WordNet

(a.) Having the form of rays; radiated, as an actinia.

Typed by Helga