Mainspring
[n] the most important spring in a mechanical device (especially a clock or watch); as it uncoils it drives the mechanism
Related Information
Related Terms
ambition, aspiration, basis, calling, cause, consideration, font, fount, fountain, fountainhead, goal, ground, guiding light, guiding star, headspring, headstream, headwater, ideal, inspiration, intention, lodestar, matter, mine, motive, principle, quarry