Brainchild (noun)

1. An idea or invention that is the result of someone's creativity or intelligence.
2. A particularly clever or innovative idea or project.

Origin:

The term "brainchild" is a combination of the words "brain" and "child". it was first recorded in the early 19th century and is thought to have been coined to describe a product of someone"s mind or imagination, as if it were an offspring of the brain.

Examples:

1. The new app was the brainchild of the company's CEO.
2. The museum exhibit was a brainchild of the curatorial team.
3. The concert series was the brainchild of the music director.
4. The new restaurant was the brainchild of the chef.
5. The marketing campaign was the brainchild of the advertising agency.