催化作用 cuīhuàzuòyòng catalysis Origin Definitions Defs Strokes Stroke Words Sentences Sents 催化 cuīhuà catalysis the acceleration of a chemical reaction by a catalyst作用 zuòyòng noun function the natural purpose or activity of something, such as a biological or chemical process; often used as a suffix to mean "-ation" or "-ing" as in 消化 xiāohuà plus this word for "digestion"