Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun The isotope of uranium with mass number 235, fissionable with slow neutrons.

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

  • noun Uranium-235.

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[actin(ium) + uranium.]

Examples

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