柯林斯詞典quadrillion /kw??dr?lj?n/ 1. N (in Britain) the number represented as one followed by 24 zeros (1024) (英國)10(24) (US and Canadian word septillion)2. DET amounting to this number 百萬之四次方 a quadrillion atoms 3. DET (as pronoun) 千萬億 a quadrillion 返回 quadrillion