Fr

Multiple Entries:
  Fr    fr.    francium  

Concise Oxford English Dictionary © 2008 Oxford University Press:
Fr
abbreviation Father (as a courtesy title of priests). [from Fr. frère, lit. ‘brother’.] symbol the chemical element francium.

Concise Oxford English Dictionary © 2008 Oxford University Press:
fr.
abbreviation franc(s).

Concise Oxford English Dictionary © 2008 Oxford University Press:
francium /ˈfransɪəm/
noun the chemical element of atomic number 87, an unstable radioactive member of the alkali metal group. (Symbol: Fr)
– origin 1940s: from the country France + -ium.
'Fr' also found in these Oxford entries:

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