<unk> s are repeatedly branched molecules. The huge number of papers on dendritic architectures such as<unk> s, dendronized, hyperbranched and brush-polymers has generated a vast variety of inconsistent terms and definitions making a clear and concise unfolding of this topic highly difficult. The purpose of this section is to provide the vocabulary required for the description of chemical and physical phenomena as well as application aspects associated with the research in the area of dendritic molecules.
Dendritic molecules are repeatedly branched species that are characterized by their structure perfection. The latter is based on the evaluation of both symmetry and polydispersity. The area of dendritic molecules can roughly be divided into the low-molecular weight and the high-molecular weight species. The first category includes<unk> s and dendrons whereas the second encompasses dendronized polymers, hyperbranched polymers, and brush-polymers (also called bottle-brushes).
The name comes from the Greek "δενδρον"/dendron, meaning "tree".  Synonymous terms are arborols and cascade-molecules.<unk>  is an internationally accepted term.<unk> s and dendrons are repeatedly branched, monodisperse, and usually highly symmetric compounds. There is no apparent difference in defining<unk>  and dendron. A dendron usually contains a single chemically addressable group that is called focal point. 
Because of the lack of the molar mass distribution high-molar-mass<unk> s and dendrons are macromolecules but not polymers.
The first<unk> s were described by Vögtle in 1978, by Denkewalter and coworkers at Allied Corporation as polylysine<unk> s in 1981, by Tomalia at Dow Chemical in 1983 and in 1985, and by Newkome in 1985. In 1990s<unk> s caused an explosion of scientific interest because of their unique molecular architecture (Fig 1). This resulted in over 5,000 scientific papers and patents published by the end of 2005.
Dendrimer
Immunotoxin
Detergent
Immunoconjugate
Pectin
Lime 
Capsid
Proteogenix