The process of bone becoming softer or losing its hardness; the reverse of the normal process of bone formation and hardening.
From de- (reverse) + ossification (from Latin os, bone + facere, to make). This term describes pathological softening of bone tissue, the opposite of normal bone development.
Deossification is what happens in serious vitamin D deficiency—bones literally become softer because they're losing the minerals that make them hard, and in advanced cases people's skeletons can actually bend under their own body weight.
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