Nu

Etymology 1
Borrowed from.

Proper noun

 * 1)  The god who serves as the personification of the primeval waters that existed before the world.

Proper noun

 * 1) one of the 56 ethnic groups recognized by the People's Republic of China.

Etymology 3
Abbreviations.

Proper noun

 * 1)  a book in the Old Testament of the Bible
 * , Nunavut

Etymology
Substantivisation of, alternative form of.

Usage notes
The masculine gender is more recent. The noun has traditionally been used with the neuter gender.