Science

Gallium Definition Gallium is a rare, silvery metallic element that is found as a trace element in coal, in bauxite, and in several minerals. It…

Parotid Gland Definition Parotid gland is either of the pair of salivary glands situated below and in front of each ear. In humans, the two…

Thenardite Definition Thenardite is a whitish vitreous mineral that consists of anhydrous sodium sulphate (Na2SO4) and occurs in saline residues. It is similar to Mirabilite,…

Bromine Definition Bromine is a reddish-brown volatile element of the halogen group found in compounds occurring in ocean water. It is a chemical element with…

Osteocyte Definition Osteocyte is a cell characteristic of mature bone tissue. It is derived from osteoblasts and embedded in the calcified matrix of bone. Osteocytes…

Mercury Definition Mercury is a silvery-white, dense, poisonous metallic element that is a liquid at room temperature and is used in thermometers, barometers, batteries, and…

Osteoclast Definition Osteoclast is a specialized bone cell that absorbs bone, allowing for the deposition of new bone and maintenance of bone strength. The osteoclast…

Uranium Definition Uranium is a heavy, silvery-white, highly toxic, radioactive metallic element of the actinide series. It has 14 known isotopes, of which U 238…

Osteoporosis Definition Osteoporosis is a bone disease characterized by decrease in bone mass and density, resulting in a predisposition to fractures and bone deformities such…

Erbium Definition Erbium is a soft malleable silvery-white element of the lanthanide series of metals: used in special alloys, room-temperature lasers, and as a pigment.…

Arsenic Definition Arsenic is a metalloid element most commonly occurring as a gray crystal, but also found as a yellow crystal and in other forms.…

Sodium Sulfate Definition Sodium sulfate is a white crystalline compound used as a mild natural laxative and in larger doses as a hydragogue cathartic. Its…