rack and pinion rackan • rack bar · · · Info · Definitions · Characters · · rack and pinion · · Text Common · · Latin · · Scripts 15 · · Length 4 · · Syllables Definitions · · · (noun) a wheel gear (the pinion) meshes with a toothed rack; converts rotary to reciprocating motion (and vice versa). Synonyms: rack and pinion. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 d latin small letter d U+0064 i latin small letter i U+0069 k latin small letter k U+006B n latin small letter n U+006E o latin small letter o U+006F p latin small letter p U+0070 r latin small letter r U+0072