Source : Webster's Revised Unabridged Dictionary (1913)

Calcification \Cal`ci*fi*ca"tion\
   (k[a^]l`s[i^]*f[i^]*k[=a]"sh[u^]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.

Source : WordNet®

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"