CALCIUM ION

[(Science: element) An element taken in through the diet that is essential for a variety of bodily functions, such as neurotransmission, muscle contraction and proper heart function. imbalances of calcium can lead to many health problems and excess calcium in nerve cells can cause their death. a white metallic element that burns with a brilliant light; the fifth most abundant element in the earth's crust; an important component of most plants and animals.A substance essential to the diet of animals and plants and is present in and is an important constituent of bones, teeth and shells.