tappet

noun
tap·​pet | \ ˈta-pət How to pronounce tappet (audio) \

Definition of tappet

: a lever or projection moved by some other piece (such as a cam) or intended to tap or touch something else to cause a particular motion

First Known Use of tappet

1745, in the meaning defined above

History and Etymology for tappet

irregular from tap entry 1

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The first known use of tappet was in 1745

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