Science

Adamite is a zinc arsenate hydroxide mineral, Zn2AsO4OH. It occurs in many different lively colors. It is a mineral that typically occurs in the oxidized…

Silver Iodide Definition Silver iodide is a pale-yellow, odorless powder that darkens when it is exposed to light. The darkening occurs because silver ions (Ag+;…

Definitions of surds: A root of a positive real quantity is called a surd if its value cannot be exactly determined. It is a number…

Barium Sulfate Definition Barium sulfate is a fine white powder used in making textiles, rubber, and plastic. It is also used in diagnostic imaging of…

Microglia Definition Microglia is any of the small neuroglial cells of the central nervous system (CNS) having long processes and ameboid and phagocytic activity at…

Witherite Definition Witherite (BaCO3) is a white, grey, or yellowish mineral consisting of barium carbonate in orthorhombic crystalline form: occurs in veins of lead ore.…

Vomiting Definition Vomiting is a matter ejected from the stomach through the mouth, usually as a result of involuntary muscle contractions. The causes of vomiting…

Theorem of Joint Variation If x ∝ y when z is constant and x ∝ z when y is constant, then x ∝ yz when…

Cerussite Definition Cerussite (PbCO3) is a usually white mineral, found in veins. It is a source of lead. It is also called white lead ore.…

Strontianite Definition Strontianite (SrCO3) is a white, lightly coloured, or colourless mineral consisting of strontium carbonate in orthorhombic crystalline form: it is a source of…

Encephalitis Definition Encephalitis is an inflammation of the brain tissue. It is different from meningitis, which is defined as inflammation of the layers of tissue,…

Acuminite is a rare halide mineral of with chemical formula: SrAlF4(OH)·(H2O). Its name comes from the Latin word acumen, meaning “spear point”. Its Mohs scale…