Definitions for cladisticskləˈdɪs tɪks
Random House Webster's College Dictionary
a system of classification of organisms based on the branchings of clades.
Category: Biology, Taxonomy
the study of such systems.
* (used with a pl. v.).
Origin of cladistics:
cladistics, cladistic analysis(noun)
a system of biological taxonomy based on the quantitative analysis of comparative data and used to reconstruct cladograms summarizing the (assumed) phylogenetic relations and evolutionary history of groups of organisms
: An approach to biological systematics in which organisms are grouped based upon synapomorphies (shared derived characteristics) only, and not upon symplesiomorphies (shared ancestral characteristics).