LINCHPIN

Linchpin

A linchpin, also spelled linch pin, lynchpin, or lynch pin, is a fastener used to prevent a wheel or other part from sliding off the axle upon which it is riding. The word is first attested in the 14th century and derives from Middle English elements meaning "axletree pin".

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linchpin

Noun

  1. a pin inserted through holes at the end of an axle, so as to secure a wheel
  2. a central cohesive source of stability and security; a person or thing that is critical to a system or organisation.


The above text is a snippet from Wiktionary: linchpin
and as such is available under the Creative Commons Attribution/Share-Alike License.

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