Search Result for "actinoid": 
Wordnet 3.0

NOUN (1)

1. any of a series of radioactive elements with atomic numbers 89 through 103;
[syn: actinoid, actinide, actinon]


ADJECTIVE (1)

1. having a radial form;
- Example: "starfish are actinoid--that is, they are radially symmetrical"



The Collaborative International Dictionary of English v.0.48:

Actinoid \Ac"tin*oid\, a. [Gr. ?, ?, ray + -oid.]
   Having the form of rays; radiated, as an actinia.
   [1913 Webster]


WordNet (r) 3.0 (2006):

actinoid
    adj 1: having a radial form; "starfish are actinoid--that is,
           they are radially symmetrical"
    n 1: any of a series of radioactive elements with atomic numbers
         89 through 103 [syn: actinoid, actinide, actinon]