reduction gear reduction division • reduction-improbation · · · Info · Definitions · Characters · · reduction gear · · Text Common · · Latin · · Scripts 14 · · Length 4 · · Syllables Definitions · · · (noun) gearing that reduces an input speed to a slower output speed. Synonyms: reduction gear. · · 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 e latin small letter e U+0065 g latin small letter g U+0067 i latin small letter i U+0069 n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 t latin small letter t U+0074 u latin small letter u U+0075