brainiac - WordReference.com Dictionary of English

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- - brain
  - brain coral
  - brain death
  - brain drain
  - brain-dead
  - brain-teaser
  - brainbox
  - braincase
  - brainchild
  - brainfever bird
  - brainiac
  - brainless
  - brainpan
  - brainpower
  - brains trust
  - brainstem
  - brainstorm
  - brainwash
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brainiac

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Concise Oxford English Dictionary © 2008 Oxford University Press:
brainiac/ˈbreɪnɪak/

▶noun N. Amer. informal a very intelligent person.

– origin 1950s: from the name of a superintelligent alien character of the Superman comic strip.

'brainiac' also found in these Oxford entries:

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