What do a.m. and p.m. stand for?

rocker arm

noun, Machinery
a rocking or oscillating arm or lever rotating with a moving shaft or pivoted on a stationary shaft.
Origin of rocker arm
1855-60 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
Cite This Source
Examples from the web for rocker arm
  • The upper valve spring seat continued moving up the valve stem until it began to make contact with the neck of the rocker arm.
  • One broken spring piece had been bent by the rocker arm and had significantly dented the valve cover-nearly penetrating it.
British Dictionary definitions for rocker arm

rocker arm

a lever that rocks about a pivot, esp a lever in an internal-combustion engine that transmits the motion of a pushrod or cam to a valve
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Cite This Source

Word of the Day

Difficulty index for rocker arm

Few English speakers likely know this word

Word Value for rocker

Scrabble Words With Friends