[1] : The Collaborative International Dictionary of English v.0.48

calcification \cal`cifica"tion\
   ka^l`si^fi^k=a"shu^n, n. physiol.
   the process of change into a stony or calcareous substance by
   the deposition of lime salt; -- normally, as in the formation
   of bone and of teeth; abnormally, as in calcareous
   degeneration of tissue.
   1913 webster

[2] : WordNet (r) 2.0

calcification
     n 1: a process that impregnates something with calcium or
          calcium salts
     2: tissue hardened by deposition of lime salts
     3: an inflexible and unchanging state; "the calcification of
        negotiations"

Calcification >> C Words
Calcification, definition of term: Calcification
calcification_pag1.html