twelvemonth

from WordNet (r) 3.0 (2006)

twelvemonth
    n 1: a period of time containing 365 (or 366) days; "she is 4
         years old"; "in the year 1920" [syn: {year}, {twelvemonth},
         {yr}]

from The Collaborative International Dictionary of English v.0.48

Twelvemonth \Twelve"month\, n.
   A year which consists of twelve calendar months.
   [1913 Webster]

         I shall laugh at this a twelvemonth hence. --Shak.
   [1913 Webster]

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