noun
just-in-time compiler; JIT compiler
Computing term for a compiler that translates code at runtime, often used in the context of virtual machines like the JVM or .NET CLR.
See also: ＪＩＴコンパイラ (ジェーアイティーコンパイラ)
The Java Virtual Machine uses a just-in-time compiler to convert bytecode into native code.