View synonyms for keystone

keystone

[ kee-stohn ]

Phonetic (Standard)IPA

noun

the wedge-shaped piece at the summit of an arch, regarded as holding the other pieces in place.
something on which associated things depend:
the keystone of one's philosophy.
Synonyms: linchpin, foundation, principle, basis
Also called keystone sack. Baseball Slang. second base ( def 1 ).

keystone

/ ˈkiːˌstəʊn /

Also calledheadstonequoin the central stone at the top of an arch or the top stone of a dome or vault
something that is necessary to connect or support a number of other related things

First recorded in 1630–40; key ¹ + stone

Congress is nearing a vote on the Keystone XL pipeline, and lawmakers made their cases for—and against—it Sunday.

Therefore, we should—you guessed it—develop the Canadian tar sands and build the Keystone pipeline.

From the looks of it, mistletoe is a keystone species and plays a crucial role in that forest ecosystem.

But if Clinton waded into the natural gas debate, she entirely avoided the Keystone one.

They have made Keystone XL the poster child of their climate-change efforts.

See how readily he gave the keystone of the whole situation to you.

She wore, just where they seemed to be needed,—as the keystone is needed in an arch,—a few fine gems.

It is not to be supposed that the change from the r keystone to the s keystone was instantaneous.

We will try to fit them first with a keystone which continues the curve of the outer arch, as at m.

The keystone to the whole system is the central office where the register or index of all criminals is kept for ready reference.

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