No. The nadir is the point on the bottom of the sky directly under your feet.
One arc second is one 3600th of a degree.
If you are talking about angles, a second is one sixtieth of a minute. A minute is one sixtieth of a degree. Soooo, a second is one 3600th of a degree (60 times 60)
The word second is in English already. It means either in position 2 or a unit of time or an angular division equivalent to one 3600th of a degree.
An arc-second is equivalent to one sixtieth (1/60) of one arc-minute. An arc-minute is equivalent to one sixtieth (1/60) of one degree.
3600th
Nadir Khayat
nadar
Nadir was Erik's friend from Persia.
Nadir Hasan is 5' 8".
Nadir D'Priest was born in 1961.
Nadir Lamyaghri was born in 1976.
Nadir Nadirov was born in 1932.