Meaning of rack and pinion

rack' and pin'ion

Pronunciation: [key]
— Mach., Auto. Mach.,Auto.
  1. See under (def. 5a).


Pronunciation: (rak'un-pin'yun), [key]
— adj.
  1. of or pertaining to a mechanism in which a rack engages a pinion:See illus. under. rack-and-pinion steering.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.