You know what it looks like… but what is it called?
TAKE THE QUIZ“bouncing pin”
We have one entry that includes the term bouncing pin.
bouncing-pin indicator
noun: an instrument that indicates knocking in a gasoline engine by the electrically recorded jumps made by a steel pin resting on a steel plate
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- The business’s new computer system proved not to be a panacea.
You can make only 12 words. Pick the best ones!
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Merriam-Webster unabridged