define metamerism
Metamerism (noun). the symmetry of a metameric structure; serial symmetry; the state of being made up of metameres. Metamerism (noun). the state or quality of being metameric; also, the relation or condition of metameric compounds.
In biology, metamerism is the phenomenon of having a linear series of body segments fundamentally similar in structure, though not all such structures are entirely alike in any single life form because some of them perform special functions. In animals, metameric segments are referred to as somites or metameres.