nondeterministic
/ˌnɒndɪˌtəːmɪˈnɪstɪk/adjective
1That does not involve determinism.
2 Mathematics and Computing. Of, relating to, or designating a mode of computation in which, at certain points, there is an unpredictable choice of ways to proceed.
Origin
Early 20th century; earliest use found in The Philosophical Review. From non- + deterministic.