Metasearch Engines
Ixquick is an example of a metasearch engine.
Permission to reproduce Ixquick image pending.
Metasearch engines search the databases of several search engines at a time.
Most eliminate duplicate listings.
Usually, you have little control over search options.
Best for an overview of your topic on the Internet, seeing which search engines will produce the best results, and for simple searches.
Other metasearch engines: Dogpile, KartOO and MetaCrawler.