雷诺 Léinuò Renault Origin Definitions Defs Strokes Stroke Words Sentences Sents 雷诺数 Léinuòshù Reynolds number The ratio of inertial forces to viscous forces in fluid mechanics.雷诺阿 Léinuò'ā Renoir Renoir, a French surname; specifically Pierre-Auguste Renoir (1841-1919), a leading French Impressionist painter