irrational number編輯正在努力提供更完整的內容，建議 20 分鐘後再回來看看irrational numberirrational number — 名詞名詞1. a number that cannot be expressed as a simple fraction1.名詞釋義無理數a number that cannot be expressed as a simple fraction例句The square root of 2 is an irrational number.