8 letters · 12 points in Scrabble
noun someone who has exceptional intellectual ability and originality
originBlend of brain + maniac, with influence from ENIAC, the name of an early computer. The term was coined as the name of the fictional supervillain Brainiac in the Superman series and first appeared in Action Comics comic book #242 in July, 1958. By surface analysis, brainy + -ac.
Etymology from Wiktionary, CC BY-SA 3.0