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English to English adjective
| 1 |
Inserted or introduced among others in the calendar; as, an intercalary month, day, etc.; -- now applied particularly to the odd day (Feb. 29) inserted in the calendar of leap year. See Bissextile, n. |  | source: webster1913 adjective satellite
| 2 |
having a day or month inserted to make the calendar year correspond to the solar year: |  | Example: Feb. 29 is an intercalary day a leap year is an intercalary year
source: wordnet30
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