adj, noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   actinide
2. 2
   any of a series of radioactive elements with atomic numbers 89 through 103 wordnet

Adjective

1. 1
   Having the form of rays; radiated, as in the species of the family Actiniidae.

Adjective

1. 1
   having a radial form wordnet

Synonyms

All synonyms

actinideactinideactinomorphicactinon

Etymology

From actin- + -oid.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.