London rocket

from The Collaborative International Dictionary of English v.0.48

London \Lon"don\, n.
   The capital city of England.
   [1913 Webster]

   {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.
      [1913 Webster]