Strong's #5212: Niycan (pronounced nee-sawn')
probably of foreign origin; Nisan, the first month of the Jewish sacred year:--Nisan.
Brown-Driver-Briggs Hebrew Lexicon:
nı̂ysân
Nisan = "their flight"
1) the 1st month of the Jewish calendar corresponding to March or April
Part of Speech: noun proper
Relation: probably of foreign origin
Usage:
This word is used 2 times:
Nehemiah 2:1: "And it came to pass in the month Nisan, in the twentieth year of Artaxerxes the king, that wine"
Esther 3:7: "month, that is, the month Nisan, in the twelfth year of king"