a power chain consisting of parallel pairs of flat links joined by pins covered with rollers, and engaging with the teeth of sprockets.
Origin of roller chain
First recorded in 1895–1900
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
engineering a chain for transmitting power in which each link consists of two free-moving rollers held in position by pins connected to sideplates
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