counterbalancer

English

Etymology

From counterbalance +‎ -er.

Noun

counterbalancer (plural counterbalancers)

1. One who, or that which, counterbalances.
2. Part of a bicycle designed to reduce vibration.
   • 2008 February 24, Dexter Ford, “Diesel-Sipping Motorcycle for the Marines”, in New York Times‎^[1]:

     The footpegs and handlebars buzz as the engine revs —— the counterbalancer that controls vibration in the stock KLR has been omitted to save weight and reduce complexity.