decennal

See also: décennal

English

Etymology

From Latin decennālis (“decennial”), from decennis (“10-year”) + -ālis (“-al”, adjective-forming suffix), from decem (“ten”) + annus (“year”) + -is (suffix forming compound adjectives). Equivalent to decennium +‎ -al.

Adjective

decennal (not comparable)

1. (obsolete) Synonym of decennial, of or related to a 10-year period.
   • 1648, Marchamont Nedham, Plea for the King and Kingdome..., page 26:

     They... appointed Archons, or Decennall Governors, that is, one Prince for ten years.

References

• “decennal, adj.”, in OED Online ⁠, Oxford: Oxford University Press, launched 2000.