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Definition of Bissextile year
1. Noun. In the Gregorian calendar: any year divisible by 4 except centenary years divisible by 400. 
Definition of Bissextile year
1. Noun. a year with an extra day, a leap year ¹
¹ Source: wiktionary.com
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1. Noun. In the Gregorian calendar: any year divisible by 4 except centenary years divisible by 400. 
1. Noun. a year with an extra day, a leap year ¹
¹ Source: wiktionary.com