n. A white or colorless crystalline compound, SiO 2, occurring abundantly as quartz, sand, flint, agate, and many other minerals and used to manufacture a wide variety of materials, especially glass and concrete.ilicon dioxide, SiO 2, a compound that occurs widely in rocks and mineral forms, such as quartz, sand, and flint, and is used to make glass, concrete, and other materials.
Greater London is a ceremonial county of England. It was created on 1 April 1965, covering the 32 London boroughs, and excludes the City of London.The region covers 1,572 km 2 (607 sq mi) and had a population of 8,174,000 at the 2011 census. It has the highest GVA per capita in the United Kingdom at Â£37,232.he term London is normally used in reference to Greater London or to the conurbation, but not often to the ancient, tiny City of London. This small area is often referred to as the City or the Square Mile and it forms the main financial district.
The City of London and the city called London are two distinct places. The head of the City of London is the 'Lord Mayor of the City of London'. This should not be confuse â¦ d with the 'Mayor of London', who is in charge of the whole of Greater London.he Diocese of London lists 35 churches in The City of London. It should be noted that the 'City of London' is a small, one-square mile, part of the Metropolitan area of Lon â¦ don. According to the Diocese, there are in excess of 1,000 churches in greater London, though this would only include diocesan churches.