نرزنَوْرُوزٌ: see what follows.نَيْرُوزٌ, an arabicized word, (S, A, Msb,) from  نَوْرُوزْ, (A, K,) which in Persian; meaning “ new  day; ” (TA;) and ↓ نَوْرُوزٌ; but the former, which is of the measure فَيْعُولٌ, is the better in repute, because فَوْعُولٌ is not the measure of an Arabic word; (Msb;) The first day of the year; New-year's-day: (A, Msb, K:) with the Persians, when the sun enters Aries: and with the Copts, the first of [the month] Toot [the ancient Thoth, or the tenth of September, N. S., excepting when immediately following their leap-year, which is when our next ensuing year is a leap-year]. (Msb, TA.) The word نيروز is said to have been first used in the time of the 'Abbásee Khaleefehs; but it is related to have been used in the time of 'Alee. (TA.)