brainiac

[ brey-nee-ak ]
/ ˈbreɪ niˌæk /
Slang.

noun

a highly intelligent person.

Origin of brainiac

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

Example sentences from the Web for brainiac

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