Undecennary

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Undecennary \Un`de*cen"na*ry\, a. [L. undecim eleven (unus one +
     decem ten) + -ennary as in decennary. Cf. {Undecennial}.]
     Occurring once in every period of eleven years; undecennial.
     [1913 Webster]
  
           An undecennary account laid before Parliament. --E.


                                                    Stiles.
     [1913 Webster]