n. : An approach to biological systematics in which organisms are grouped based upon synapomorphies (shared derived characteristics) only, and not upon symplesiomorphies (shared ancestral characteristics).
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. 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
Word Usage
"The term nested in cladistics is used precisely in the same sense as in nested hierarchy."