decenniad
English
Usage notes
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. Decenniad &c. has no such restriction.
Synonyms
- See decennium
References
- Oxford English Dictionary, 1st ed. "decenniad, n." Oxford University Press (Oxford), 1894.
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