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main•stay



Pronunciation: (mān'stā"), [key]
n.
1. Naut.the stay that secures the mainmast forward.
2. a person or thing that acts as a chief support or part: Coffee is the mainstay of the country's economy.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

mainspringmain stem
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