Domesday

from The Collaborative International Dictionary of English v.0.48

Domesday \Domes"day`\, n.
   A day of judgment. See {Doomsday}. [Obs.]
   [1913 Webster]

   {Domesday Book}, the ancient record of the survey of most of
      the lands of England, made by order of William the
      Conqueror, about 1086. It consists of two volumes, a large
      folio and a quarto, and gives the proprietors' tenures,
      arable land, woodland, etc. [Written also {Doomsday
      Book}.]
      [1913 Webster]

from Bouvier's Law Dictionary, Revised 6th Ed (1856)

DOMESDAY, or DOMESDAY-BOOK. An ancient record made in the time of William 
the Conqueror, and now remaining in the English exchequer, consisting of two 
volumes of unequal sizes, containing surveys of the lands in England.