1. Having a radial form
   "starfish are actinoid--that is, they are radially symmetrical"

1. Any of a series of radioactive elements with atomic numbers 89 through 103
   - actinide, actinon

Derived forms: actinoids

See also: actinomorphic, actinomorphous

Type of: group, grouping

Encyclopedia: Actinoid

• imaging
• imaginings
• imagism
• imago
• imam
• Imamu Amiri Baraka
• imaret
• imaum
• Imavate
• imbalance
• imbalanced
• imbauba
• imbecile
• imbecilic
• imbecility
• imbed
• imbibe
• imbiber
• imbibing
• imbibition
• imbricate
• imbricated
• imbrication
• imbroglio
• imbrue