brain ‧ child /ˈbreɪntʃaɪld/ BrE AmE noun [singular]
an idea, plan, organization etc that someone has thought of without any help from anyone else
brainchild of
The festival was the brainchild of Reeves.
brain ‧ child /ˈbreɪntʃaɪld/ BrE AmE noun [singular]
an idea, plan, organization etc that someone has thought of without any help from anyone else
brainchild of
The festival was the brainchild of Reeves.
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012