Source : Webster's Revised Unabridged Dictionary (1913)

Fossilization \Fos`sil*i*za"tion\, n. [Cf. F. fossilisation.]
   The process of converting, or of being converted, into a
   fossil.

Source : WordNet®

fossilization
     n 1: the process of fossilizing a plant or animal that existed in
          some earlier age; the process of being turned to stone
          [syn: {fossilisation}]
     2: becoming inflexible or out of date [syn: {fossilisation}]