aleatoric
adjective
ale·a·tor·ic ˌā-lē-ə-ˈtȯr-ik 
-ˈtär-
: characterized by chance or indeterminate elements
aleatoric music
Example Sentences
Recent Examples on the Web When the sun shines through and paints floors, walls, and people with moving color, the effect is aleatoric, agnostic, and otherworldly. 
Susan Tallman, The New York Review of Books, 25 Apr. 2020
Susan Tallman, The New York Review of Books, 25 Apr. 2020 Word History
Etymology
Latin aleatorius
First Known Use
1921, in the meaning defined above