outgroup
Noun. (systematics) In cladistics, all the taxa included in a study that do not belong to the ingroup that is of immediate interest. .This is an unmodified, but possibly outdated, definition from Wiktionary and used here under the Creative Commons license. Wiktionary is a great resource. If you like it too, please donate to Wikimedia.
This entry was last updated on RefTopia from its source on 3/20/2012.