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gridiron pendulum

noun
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Definition of gridiron pendulum

: a compensation pendulum in which the unequal expansion of two different metals is utilized to maintain constant effective pendulum length

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“Gridiron pendulum.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/gridiron%20pendulum. Accessed 12 December 2019.

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