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{%type%} Definitions

WordNet 3.0Copyright Princeton University


Short "hint"

n. - A radioactive element of the alkali-metal group discovered as a disintegration product of actinium.

Usage examples (7)
  • Some of the elements, such as francium and californium, were named to honor the places where they were discovered.
  • Only 20 atoms of francium exist at any given instant.
  • And phosphorus and francium and fluorine and terbium,
  • Lindsay's about as unstable right now as the element francium. for more
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