[klad-uh-jen-uh-sis, kley-duh-] 
| evolutionary change by the branching off of new species from common ancestral types. |
| clad·o·gen·e·sis (klād'ə-jěn'ĭ-sĭs) n. The evolutionary change and diversification resulting from the branching off of new taxa from common ancestral lineages. [Greek klados, branch + -genesis.] clad'o·ge·net'ic (-jə-nět'ĭk) adj., clad'o·ge·net'i·cal·ly adv. |
əˈdʒɛn