adj. 1 a (of a day or a month) inserted in the calendar to harmonize it with the solar year, e.g. 29 Feb. in leap years. b (of a year) having such an addition. 2 interpolated; intervening.
[ L intercalari(u)s (as INTERCALATE) ]
INTERCALARY
Meaning of INTERCALARY in English
Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012