Definition: The term Binomial System has two parts and is linked to the classification of species with each species having a scientific name. The name is usually made up of two parts: the first comes from the genus group; the second from the name of the species.
You and I belong to the genus group homo and our species is sapiens. The scientific term for humans is Homo sapiens - the name is added in brackets and written in italics.
Another example is the European Robin (Erithacus rubecula).