n.;
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 ]
n.;
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 ]