Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun Plural form of actinoid.

Etymologies

Sorry, no etymologies found.

Examples

  • There are fifteen actinoid (rare earth) elements from which fissile isotopes can be produced; uranium and thorium are the only naturally occurring actinoids.

    Dissident Voice

  • Instead of leaving the lanthanoids and actinoids in separate groups, why don't they merge them into the appropriate circles?

    Slashdot

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