Superman's Nemesis Whose Real Name Is Vril Dox

This page is the CodyCross answer for the clue below from Underground Worlds, Group 2174, Puzzle 5 (Vertical Shafts).

Question is: Superman's Nemesis Whose Real Name Is Vril Dox

and the answer is: BRAINIAC

Word Meaning:

BRAINIAC — (slang, sometimes derogatory) A very intelligent and usually studious, erudite person.

Definitions from Wiktionary.