Definition of: keystone

(kē′stōn′) noun
1. Archit. The uppermost and last–set stone of an arch, which completes it and locks its members together.
2. The fundamental element, as of a science or doctrine.
KEYSTONE (k) OF AN ARCH

Most often used phrases:

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'keystone' used in other domains:

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Statistical data

"keystone" has the frequency of use of 0.0004% on city-data.com forum

"keystone" has the frequency of use of 0.0003% on en.wikipedia.org.

Phrases starting with the letter: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Definition of: keystone

Most often used phrases:

'keystone' used in million biggest domains list by Alexa.com:

'keystone' used in other domains:

Statistical data

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