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Definition of Fr
1. Noun. A radioactive element of the alkali-metal group discovered as a disintegration product of actinium.
Medical Definition of Fr
1.
1. Symbol for francium.
2.
Lexicographical Neighbors of Fr
Other Resources:
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1. Noun. A radioactive element of the alkali-metal group discovered as a disintegration product of actinium.
1.
1. Symbol for francium.
2.