I take it you mean the naming system for living things with two Latin words each. The guy who started it was Carl Linnaeus.
Genus
The science of naming living organisms is called Taxonomy. The two-word system is called binomial nomenclature
There is not a specific system of naming federal agencies. Most of them are acronyms. Perhaps "specific" would be a good word.
Brontosaurus Cheessus
Binomial Nomenclature
binomial nomenclature
The 20-letter word you are looking for is "taxonomy." Taxonomy is the branch of science that deals with the classification and naming of organisms.
His naming system was too long
These ions are named using either the Stock system or the traditional naming system.
The two word system that was devised for naming organisms is called "binomial nomenclature." "Binomial" is defined as "two names." ~ Kimberlee
Its basically saying that it is a 2 way naming system bi means #2 in Latin and nomial is name so 2 name i.e genus and species
Do you know what you will be naming the baby?