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Cf,symbol for the element californiumcalifornium
[from California], artificially produced, radioactive metallic chemical element; symbol Cf; at. no. 98; mass no. of most stable isotope 251; m.p. about 900°C;; b.p. about 1,470°C;; density unknown; valence +3.
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1. Abbr. for “cost and freight.”
2. Abbr. for “cooling fan.”
The country code for the Central African Republic.