francium

About 0.02 uses per million words.

Meaning

1. noun The chemical element (symbol Fr) with an atomic number of 87. It is an intensely radioactive alkali metal that is not found in nature. An atom of this element.
2. noun An atom of this element.

Similar words

fr fermium fluorine fluorin flourine frank fluoronium french franc frankian frankia

Often followed by

fr is radium and isotopes are to has was

Word family

franciums