rack-and-pinionEnglishOxford New American Dictionaryrack-and-pinion /ˈˌrak ən ˈpinyən, ˈˌræk ən ˈpɪnjən / ▸ adjective [attributive] denoting a mechanism, as for a car steering system, using a fixed cogged or toothed bar or rail engaging with a smaller cog: rack-and-pinion steering.