有理数集 yǒulǐshùjí set of rational numbers Origin Definitions Defs Strokes Stroke Words Sentences Sents 有理数 有理數 yǒulǐshù rational number a number that can be expressed as a fraction of two integers; includes all integers, fractions, and terminating or repeating decimals集 jí noun [set] (abbreviation) a set of items with common properties in mathematics; short for 集合 jíhé