clade

n. group of organisms that are classified together as descendants of a common ancestor (Biology)

A clade is a taxonomic group of organisms comprising a single common ancestor and all the descendants of that ancestor. Any such group is considered to be a monophyletic group of organisms, and can be represented by both a phylogenetic analysis, as in a tree diagram, and by a cladogram (see cladistics), or simply as a taxonomic reference.
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Noun
1. a group of biological taxa or species that share features inherited from a common ancestor
(hypernym) biological group

All descendants of any given species. A single whole branch of a phylogeny.

clade
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