brainiac

[ brey-nee-ak ]

/ ˈbreɪ niˌæk /

Slang.

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noun

a highly intelligent person.

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Origin of brainiac

From Brainiac, a superintelligent, villainous alien in the Superman comics, probably brain + (man)iac

Words nearby brainiac

brain fingerprinting, brainfood, brain freeze, brain gain, brain hormone, brainiac, brainish, brainless, brain mantle, brainpan, brain-picking

How to use brainiac in a sentence

Except for maybe his brainiac wife… but she could do better anyway.
All Your Internet Boyfriends Are Taken: Gosling, Cumberbatch, and now Joseph Gordon-Levitt|Melissa Leon|January 3, 2015|DAILY BEAST
“Scientists know now that being a brainiac is not so much about IQ but about executive function,” Golinkoff asserts.
15 Signs You'll Raise a Genius|Anneli Rufus|October 24, 2011|DAILY BEAST

British Dictionary definitions for brainiac

brainiac

/ (ˈbreɪnɪˌæk) /

noun

informal a highly intelligent person

Word Origin for brainiac

C20: from a super-intelligent character in an American comic strip

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012