A Meta-Search Engine is a search engine that sends user requests to several other heterogeneous search tools (like search engines, web-directories, Deep-Web search portals or even other Meta Search Engines) and compiles the results in a homogeneous manner based on a specific algorithm. So unlike search engines Meta-Search Engines do not have database-indexes, instead a virtual index based on the search query is generated on fly.
List of Meta search engines Edit
- Article about Meta search engine at En.Wikipedia
- An article on Meta-Search Engines
- Guide to Meta-Search Engines by UC Berkeley
- Information retrieval on Internet using meta-search engines : A review, Journal of scientific & industrial research, 67(10) (2008) 739-746.