decalcification
noun
de·cal·ci·fi·ca·tion (ˌ)dē-ˌkal-sə-fə-ˈkā-shən 
: the removal or loss of calcium or calcium compounds (as from bones or soil)
decalcify
(ˌ)dē-ˈkal-sə-fī
transitive verb 
Word History
First Known Use
1859, in the meaning defined above
Medical Definition
decalcification
noun
de·cal·ci·fi·ca·tion (ˌ)dē-ˌkal-sə-fə-ˈkā-shən
: the removal or loss of calcium or calcium compounds (as from bones or soil)