The maps are presented at 20-year intervals (vicennials) because of the nature of the data, particularly for years prior to 1960 when estimation procedures were not nearly as developed as today.
Source: wiktionary
Vicennial
Synonyms for "vicennial" (8 found)
Ranked by relevance and common usage.
Closest matches (2)
Adjective(2 words)
twenty-year cycletwenty-year duration
Strong matches (2)
Adjective(2 words)
twenty-year periodtwenty-yearly
Related words (4)
Adjective(3 words)
two decadestwo-decade cycletwo-decade event
Adjective(1 words)
Related word relations
OpenGloss and ConceptNet supply richer edges like generalizations, collocations, and derivations.
More general
10 entriescycledurationeventintervalrecurrencetemporal measuretemporal periodtime intervaltime measuretime period
More specific
9 entriestwenty-year intervaltwenty-year spantwo-decade festivalvicennial celebrationvicennial commemorationvicennial cyclevicennial durationvicennial eventvicennial period
Collocations
10 entriestwenty year cycletwenty year periodtwenty-year intervaltwenty-year periodtwo decadesvicennial celebrationvicennial cyclevicennial eventvicennial intervalvicennial period
Inflections
3 entriesDerivations
4 entriesTranslations
2 translations across 2 languages.
Italian
1 entries- vicennale adj (Translations)
Latin
1 entries- vicennialis adj (Translations)
Sample sentences
4 total sentences available.
Among the well established anniversaries celebrated by Chautauqua classes from year to year are the vicennials. A strong sense of comradeship is developed among members who come to Chautauqua twenty years after graduation...
Source: wiktionary
The feast of Constantine's vicennials fell on the 25th of July this year: it was the commencement of the twentieth year of his reign. It is supposed, that to avoid interrupting affairs or greater moment, this ceremony was deferred till the end of the council, which broke up the 25th of August.
Source: wiktionary
Roman coins mentioning the vota publica for Macrinus are RIC IV.1 5–13; on vota publica for the decennials and vicennials of emperors in the 2nd and 3rd c. ad, see Chastagnol 1984.
Source: wiktionary