Found in the following dictionaries
Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
"Mainspring" Definition
noun
The chief motivating force: the mainspring of a reform movement.
Source: American Heritage Dictionary
The principal spring in a mechanical device, especially a watch or clock, that drives the mechanism by uncoiling.
Source: American Heritage Dictionary
The chief spring in a mechanism especially of a watch or clock.
Source: Merriam-Webster
The chief or most powerful motive, agent, or cause.
Source: Merriam-Webster
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