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

• needlewood
• needlework
• needleworker
• needn't
• sugar cookie
• sugar corn
• sugar daddy
• sugar diabetes
• sugar maple
• sugar of lead
• sugar palm
• sugar pea
• Sugar Ray Robinson
• sugar refinery
• sugar shell
• sugar snap
• sugar snap pea
• sugar soap
• sugar sorghum
• sugar spoon
• sugar sumac
• sugar syrup
• phonetics
• phoney
• phonic