指数函数 zhǐshùhánshù exponential function Origin Definitions Defs Strokes Stroke Words Sentences Sents 指数 指數 zhǐshù exponent (math) A small number or symbol written at the upper right of another number to show how many times it is multiplied by itself.函数 函數 hánshù function (math.) a relationship where each input value corresponds to exactly one output value