Moderate as in keynote/keystone A component, typically found in devices such as clocks or watches, that serves as the primary source of power, as in a fountain. Clear All
4 Example Sentences Showcasing the Meaning of 'Mainspring'
The young student learned about the mainspring while exploring the inner workings of a vintage pocket watch.
The watch enthusiast admired the precision engineering of the mainspring in high-end luxury watches.
Learning about the scientific method is the mainspring of any student's journey into the world of research and experimentation.
The protagonist's quest for justice served as the mainspring, propelling the gripping storyline of the detective novel.
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