pinion

³pinion

noun

Definition of PINION

1

: a gear with a small number of teeth designed to mesh with a larger wheel or rack

2

: the smaller of a pair or the smallest of a train of gear wheels

Origin of PINION

French pignon, from Middle French peignon, from peigne comb, from Latin pecten — more at pectinate

First Known Use: 1659

Other Mechanical Engineering Terms

centrifuge, differential, flange, lathe, linchpin, plenum, ratchet, traction