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{%type%} Definitions

WordNet 3.0Copyright Princeton University
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Short "hint"

The energy given off as a result of breaking apart of nuclei of atoms.

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Usage examples (38)
  • radioactivity is a powerful and dangerous energy used to make electricity.
  • During her years of work, Curie coined the term radioactivity, and named Polonium.
  • Something other than radioactivity is required to release nuclear energy within a star.
  • Even the historiography of women in radioactivity research has followed the same trend.
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The Open Dictionary of English is a collaborative project, based on Open Source materials, LearnThat resources, and partner APIs.
We give special thanks to our LearnThat volunteers, as well as Princeton University and Wiktionary for their Open Source word data. We're also grateful for the support given by Google, Wordnik.com, Dictionary.com, Stands4.com and YouTube, OEDILF.com, Kylescholz.com, Best-Practice.com, Forvo.com, as well as the generous Creative Commons community.