(physics) A quantum-mechanical phenomenon whereby a spinning superconductive metal sphere generates a magnetic field whose axis lines up exactly with the spin axis.

An administrative area in England combining the City of London, the City of Westminster and 31 other London boroughs. Greater London borders Essex, Hertfordshire, Buckinghamshire, Berkshire, Surrey and Kent.

A riverside fortress in London, used as a palace, a prison and now a museum housing the Crown Jewels.

The area in central London, England containing the financial district, usually abbreviated to the City. / The local authority and city which is part of Greater London.

The London underground railway system.

(geology) An Ypresian marine geological formation, known for its fossils, that crops out in southeast England.

(medicine) A paste made of caustic soda and unslaked lime, used as a caustic to destroy tumours and other morbid enlargements.

plural of London pride

The northeastern part of London, the capital city of the United Kingdom and of England. / A city on the southeast coast of Eastern Cape, South Africa.

A neutral tint given to spectacles, shade glasses for optical instruments, etc., which reduces the intensity without materially changing the colour of the transmitted light.