noun. abnormal softening of bones caused by deficiencies of phosphorus or calcium or vitamin D.
1. Noun, singular or mass If you're not getting enough of it, you may develop osteoporosis, osteomalacia and other bone disorders in the long run. 2. Verb, base form This is why a deficiency in calcium can lead to osteomalacia, or chronic bone pain and osteoporosis, which is a combination of chronic bone weakness and bone pain that can be both crippling and deforming.