1. MetaCrawler, now know as Zoo.com, is a metasearch engine originally developed in 1994 by the University of Washington by Erik Selberg and Professor Oren Etzioni. It provided users with the option to search news, videos, images, and both white and yellow pages. MetaCrawler blended data from many of the top search engines including Yahoo!, Google, Bing, Ask.com, About.com and others.
2. An Internet spider is sometimes referred to as a metacrawler.