decennium

From Latin decem (“ten”) + annum (“year”).

• (UK) IPA^(key): /dɪˈsɛnɪəm/

decennium (plural decenniums or decennia)

1. A period of ten years.
   • 1998, soc.culture.netherlands, Usenet‎:

     G.B. still has to cope with the heritage of approx. 20 years of consecutive Conservative reigns, just as you guys are getting your act together after almost a decennium of Enlightened Ronnie.

   • 1996, soc.culture.usa, Usenet‎:

     Christian leaders refused even to *look* through Galileo's telescope (as a matter of fact, the Vatican cleared Galileo's name only as late as in the previous decennium).

Although decade may be taken as any group of ten years, it is commonly restricted to the informal ten-year periods of the calendar whose last digits run from 0 to 9. Decennium &c. has no such restriction.

• decenniad
• decennary
• (in some contexts): decade

• (adj.): See decennial
• (adv.): See decennially
• (10-year anniversary): decennial
• millennium

From Latin decennium.

decennium n (singular definite decenniet, plural indefinite decennier)

1. decade; a period of ten years

• “decennium” in Den Danske Ordbog
• “decennium” in Ordbog over det danske Sprog

• Audio

  (file)

decennium n (plural decennia or decenniën, diminutive decenniumpje n)

1. a period of ten years

• jaartien, decade

decem (“ten”) + annus (“year”)

• (Classical) IPA^(key): /deˈken.ni.um/, [dɛˈkɛn.ni.ʊ̃]

decennium n (genitive decenniī or decennī); second declension

1. decennium; decade

Second-declension noun (neuter).

¹Found in older Latin (until the Augustan Age).

• duodecennium

• biennium
• triennium
• quadriennium
• quinquennium
• sexennium
• septuennium
• octennium
• vicennium
• tricennium

• biduum
• triduum
• trimenium

• decennium in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• decennium in Gaffiot, Félix (1934) Dictionnaire Illustré Latin-Français, Hachette

• IPA^(key): /dɛˈsɛnɪɵm/

• audio

  (file)

decennium n

1. decade; a period of ten years