noun.
A creation, original idea, or innovation, usually used to indicate the originators
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
a product of your creative thinking and work
Word Usage
"In addition to that, Haugh's "Tractorri" - that's what he calls his brainchild - also comes with the Gallardo's E-gear sequential automatic transmission and its all-wheel drive system."