'Fossilization' definitions:

Definition of 'fossilization'

From: WordNet
noun
The process of fossilizing a plant or animal that existed in some earlier age; the process of being turned to stone [syn: fossilization, fossilisation]
noun
Becoming inflexible or out of date [syn: fossilization, fossilisation]

Definition of 'Fossilization'

From: GCIDE
  • Fossilization \Fos`sil*i*za"tion\, n. [Cf. F. fossilisation.] The process of converting, or of being converted, into a fossil. [1913 Webster]