Lexic.us

Definition of Francium

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

Definition of Francium

1. Noun. A metallic chemical element (''symbol'' Fr) with an atomic number of 87. ¹

¹ Source: wiktionary.com

Definition of Francium

1. a radioactive element [n -S]

Medical Definition of Francium

1. Francium. A radioactive alkali metal with the atomic symbol fr, atomic number 87, and atomic weight 223. The mass numbers of other known isotopes are 204-213, 217-222, and 224. Its valence is +1. Chemical name: Francium (12 Dec 1998)

Lexicographical Neighbors of Francium

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