brain·i·ac 
(brānē-ăk′)
(brānē-ăk′)n.
Slang
Slang
A person who is highly intelligent: "These companies are not hot Silicon Valley startups swarming with Gen-X brainiacs" (Ronald Henkoff).
[Probably from Brainiac, a highly intelligent villain in DC Comics, blend of BRAIN and MANIAC.]
- chronicle
- chronicle play
- chronicler
- chronic obstructive pulmonary disease
- chronic traumatic encephalopathy
- chronic wasting disease
- chrono-
- chronobiologic
- chronobiological
- chronobiologically
- chronobiologist
- chronobiology
- chronogram
- chronogrammatic
- chronogrammatically
- chronograph
- chronographic
- chronographically
- chronologer
- chronologic
- chronological
- chronological age
- chronologically
- chronologist
- chronology