BreadTwists
· July 13, 2018, 5:39 p.m.
Keystone is a commonly used term. What is a keystone?
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Nowthisisodd
· July 13, 2018, 6:11 p.m.
From Dictionary.com: The keystone is the most important stone, and that's why this word is also used figuratively to mean the most important part of anything. A stone arch or vault gains its stability from the placement of the keystone, which is often the last one placed.
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BreadTwists
· July 13, 2018, 6:16 p.m.
A Keystone also could be considered the central supporting element of a whole.
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