| Definitions from the WebTerm: mainspring 
   Noun - Mechanical Device: A mainspring is a spiral metal spring in a mechanical device, typically a watch, that stores energy and provides power to move the gears and hands.
    
     Example Sentence: The watchmaker carefully examined the mainspring to ensure its proper tension and functionality.     
     Related Amazon Products: Mainspring for Watches      Noun - Figurative Meaning: Mainspring can refer to the chief or most important factor that drives and influences something.
    
     Example Sentence: The relentless pursuit of knowledge was the mainspring that fueled his scientific discoveries.     
     Related Amazon Products: Motivational Books      Noun - Local Usage: In local usage, mainspring can also refer to a natural water source that provides sustenance to a specific region.
    
     Example Sentence: The small village depended on the nearby freshwater spring as its mainspring for drinking water and irrigation.     
     Related Amazon Products: Water Purification Systems      Verb - Rare Usage: Mainspring can be used as a verb, albeit rarely, to describe the act of powering or supplying something.
    
     Example Sentence: The windmills were mainspringed by the steady gusts of wind from the coastal breeze.     
     Related Amazon Products: Wind Turbines      Adjective - Local Usage: In local usage, mainspring can also be used as an adjective to describe something that is widely popular within a specific geographic area.
    
     Example Sentence: The local bakery's mainspring pastry, the decadent chocolate croissant, was a sensation among the townspeople.     
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