Not every dictionary I checked has "nu-" but here are a few examples:
nu-
dictionary.com — indicating an updated or modern version of something: nu-metal music
Bing — new: new, or modern
Google — respelling of ‘new,’ used esp. in names of new or revived genres of popular music.
Where did this orginate? Etymonline shows no entry.
Also, how does this differ from "neo-"?
neo- — a combining form meaning “new,” “recent,” “revived,” “modified,” used in the formation of compound words: Neo-Darwinism; Neolithic; neoorthodoxy; neophyte.
Why do we have "nu-metal" instead of "neo-metal" or "neometal"? Would it be appropriate to use "nu-" for non-musical genres (e.g., classifying films as "nu-western")?
Best Answer
One could do worse than quote OED:
Although it always follows that etymology and basic meaning, OED has three definitions:
It doesn't differ from neo- much, other than in register. Commercially, Nuform chose nu- because of its similarity to new. Similarly with nu-disco, nu metal and the like: those who coined the terms (presumably in the music industry/“scene” before the newspapers) chose nu- because of its similarity with new. In both cases, neo- would not have worked so well, as it generally requires a Greek root to combine with and it’s unlikely that the target market would appreciate it.