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noun
1.
the wedge-shaped piece at the summit of an arch, regarded as holding the other pieces in place.
2.
something on which associated things depend: the keystone of one's philosophy.
3.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Keystone
is always a great word to know.
So is ort. Does it mean:
| a scrap or morsel of food left at a meal. |
| the offspring of a zebra and a donkey. |
Collins
Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History
keystone
"stone in the middle of an arch, which holds up the others," 1637, from key (1) in fig. sense of "that which holds together other parts." Fig. sense is from 1641. Pennsylvania was called the Keystone State because of its position (geographical and political) in the original
EXPAND American confederation, between northern states and southern ones. Keystone cops were the bumbling crew of officers in the slapstick films produced by Keystone Company, formed by Canadian-born U.S. film director Mack Sennett (1884-1960) in 1912.
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Online Etymology Dictionary, © 2010 Douglas Harper
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