A rectangular field on screen that accepts typed-in text in order to look up something or launch a search. A search box is also called a "search bar" or "search field." See search engine
Encyclopedia Search Boxes
These are the search boxes for this encyclopedia on our website (top) and the Windows version (bottom).
The Browser Search Box
All Web browsers include a search box where either a Web address (URL) or a query are typed in. See address bar