Definitions for "CLADES"
Major families, or branches, on the genealogical tree of a virus, such as HIV.
An anthropology term used to describe a group of individuals, families, tribes or sub set populations that have originated from a foundation population and have branched out. The four major clades are sub Saharan African, Native American, Indo European and East Asian.
"Families of a viral strain." Presently there are seven known clades of HIV but more are expected to be found.