noun
multithreading
Computing term for executing multiple threads concurrently within a single process.
このアプリはマルチスレッドに対応している。
This application supports multithreading.
並列処理 is a broader term for parallel processing, which may involve multiple processes or cores, whereas マルチスレッド specifically refers to multiple threads within one process.
Borrowed from English 'multithread' or 'multithreading', combining 'multi-' and 'thread'.