noun Automotive.
a rod in an overhead-valve engine that is part of the linkage used to open and close the valves.
Also, push rod.

1905–10; push + rod

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World English Dictionary
pushrod (ˈpʊʃˌrɒd)
a metal rod transmitting the reciprocating motion that operates the valves of an internal-combustion engine having the camshaft in the crankcase

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
Following the pushrod stroke measurements, the wheels were removed and the inside diameters of all the drums were measured.
The pushrod travel on all chambers checked were within maximum allowable limits.
In a pushrod engine, the short block contains the cam.
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