Related to Adar Rishon: Adar II
An intercalary month in the Jewish calendar, added in leap years before the regular month of Adar. See Table at calendar.
[Hebrew 'ădār ri'šôn, first Adar : 'ădār, Adar; see Adar + ri'šôn, first; akin to rō'š, head, top, beginning; see Rosh Hashanah.]
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