rewrite engine
software component that performs rewriting on Uniform Resource Locators, modifying their appearance. This modification is called URL rewriting. It is a way of implementing URL mapping or routing within a web application
en-US/ɹiˈɹaɪtv ˈɪnd͡ʒən/
en-GB/ˌɹiːˈɹaɪt ˈɛnd͡ʒɪn/