出典:Wiktionary
decennary (複数形 decennaries)
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. Decennary &c. has no such restriction.
From Medieval Latin decennārius, a variant of decanarius (“containing ten items; related to the number ten”).[2]
decennary (not comparable)
decennary (not comparable)
decennary (複数形 decennaries)