concoction

something (as a device) created for the first time through the use of the imagination the first submarine must have seemed like the looniest concoction ever to spring from the human mind Synonyms brainchild, coinage, invention, contrivance, creation, innovation, wrinkleRelated Words contraption, device, gadget, gizmo (also gismo), novelty; design, product, work; dream, fantasy (also phantasy), picture, vision; conception, imagining, originationNear Antonyms carbon copy, clone, copy, dupe, duplicate, duplication, facsimile, imitation, reduplication, replica, replication, reproduction