Medical Definition of Clade
Clade: Related organisms descended from a common ancestor. For example, isolate M of HIV-1 (the human immunodeficiency virus) consists of at least ten clades. Imported from the Greek, klados, branch in 1911 in reference to the Tree of Life.
Last Editorial Review: 9/14/2016
Back to MedTerms online medical dictionary A-Z List
Need help identifying pills and medications?