aleatory
/ˈeɪlɪətərɪ/adjective
1- depending on the throw of a die or on chance; random掷骰决定的; 机运的; 任意的。
1.1
- relating to or denoting music or other forms of art involving elements of random choice (sometimes using statistical or computer techniques) during their composition, production, or performance（有时在合成、生产或执行中使用数据或计算机技术）偶然的, 随机的, 即兴的。
词源
late 17th cent.: from Latin aleatorius （see ALEATORIC）.