pushrod

noun4

1. •
   A rigid reciprocating rod that, by its movement, transmits force to actuate a mechanism.
2. •
   A rod in a piston engine that actuates rocker arms above the cylinder head.

   • The cam-within-a-cam concept has existed for decades, but perfecting it for production might just add another decade to the life of the pushrod engine. — 2007
3. •
   A rod in an internal gear hub that actuates the shifting mechanism.

   • An internal-gear hub with a hollow axle may be re-oiled by removing the pushrod or indicator spindle and squirting oil into the end of the axle. — 2000
4. •
   A rod used in the transmission of flight control inputs to an aircraft's control surfaces.