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Webster 1913 Edition

Undecennary

Unˊde-cen′na-ry

,

Adj.

[L.

undecim

eleven (

unus

one +

decem

ten) +

-ennary

as in

decennary

. Cf.

.]

Occurring once in every period of eleven years; undecennial.

An

undecennary

account laid before Parliament.

E. Stiles.

Definition 2024

undecennary

undecennary

English

Adjective

undecennary ‎(not comparable)

Once every eleven years; undecennial.
An undecennary account laid before Parliament. — E. Stiles.