1) American steampunk novel 2) Chief motive 3) Chief motive power 4) Principal motive 5) Spring 6) Tor Books book
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https://www.crosswordclues.com/clue/mainspring
1) Cause
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https://www.crosswordclues.com/clue/mainspring
A mainspring is a spiral torsion spring of metal ribbon used as a power source in mechanical watches, some clocks, and other clockwork mechanisms. Winding the timepiece, by turning a knob or key, stores energy in the mainspring by twisting the spiral tighter. The force of the mainspring then turns the clock`s wheels as it unwinds, until the next ....
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http://en.wikipedia.org/wiki/Mainspring
• (n.) The principal or most important spring in a piece of mechanism, especially the moving spring of a watch or clock or the spring in a gunlock which impels the hammer. Hence: The chief or most powerful motive; the efficient cause of action.
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http://thinkexist.com/dictionary/meaning/mainspring/
(from the article `watch`) The mainspring, the element that drives the watch, consists of a flat spring-steel band stressed in bending or coiling; when the watch, or other ...
Found on
http://www.britannica.com/eb/a-z/m/15
The coiled spring of tempered steel which provides the power source for all watches (except those with battery- or solar-powered movements) and most clocks. Â References to spring-driven clocks in Italian documents of the 15th century suggest that Italy, rather than Germany, may have been the home o
Found on
http://www.encyclo.co.uk/local/20450
Main'spring` noun The principal or most important spring in a piece of mechanism, especially the moving spring of a watch or clock or the spring in a gunlock which impels the hammer. Hence: The chief or most powerful motive; the efficient cause of action.
Found on
http://www.encyclo.co.uk/webster/M/9
[
n] - the most important spring in a mechanical device (especially a clock or watch)
Found on
http://www.webdictionary.co.uk/definition.php?query=mainspring
noun the most important spring in a mechanical device (especially a clock or watch); as it uncoils it drives the mechanism
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https://www.encyclo.co.uk/local/20974
No exact match found.
