What is the definition of hypocalcemia?
<answer> Lower-than-normal level of calcium in the blood, which makes the nervous system highly irritable, as evidenced by tetany. <context> Medical Definition of Hypocalcemia. Hypocalcemia: Lower-than-normal level of calcium in the blood, which makes the nervous system highly irritable, as evidenced by tetany (spasms of the hands and feet, muscle cramps, abdominal cramps, and overly active reflexes). Chronic hypocalcemia contributes to poor mineralization of bones, soft bones (osteomalacia), and osteoporosis.