de·cal·ci·fy 
(dē-kălsə-fī′)
(dē-kălsə-fī′)v. de·cal·ci·fied, de·cal·ci·fy·ing, de·cal·ci·fies
v.tr.
To remove calcium or calcium compounds from (bones or teeth, for example).
v.intr.
To lose calcium or calcium compounds.
de·cal′ci·fi·cation (-fĭ-kāshən) n.
de·calci·fi′er n.