polychotomy
/ˌpɒlɪˈkɒtəmi/Science
noun
Division into more than two parts or groups; especially (Taxonomy ) the division of a taxonomic grouping into more than two subgroups; an instance of this.
Origin
Late 19th century; earliest use found in American Naturalist. From poly- + -chotomy, after polychotomous; compare -tomy.