London \Lon"don\, n. The capital city of England.

London paste (Med.), a paste made of caustic soda and unslacked lime; -- used as a caustic to destroy tumors and other morbid enlargements.

London pride. (Bot.)
   (a) A garden name for Saxifraga umbrosa, a hardy perennial herbaceous plant, a native of high lands in Great Britain.
   (b) A name anciently given to the Sweet William. --Dr. Prior.

London rocket (Bot.), a cruciferous plant (Sisymbrium Irio) which sprung up in London abundantly on the ruins of the great fire of 1667.

Source: Webster's Revised Unabridged Dictionary (1913)