[koh-ev-uh-loo-shuh
n or, especially Brit., -ee-vuh-] 
| evolution involving a series of reciprocal changes in two or more noninterbreeding populations that have a close ecological relationship and act as agents of natural selection for each other, as the succession of adaptations of a predator for pursuing and of its prey for fleeing or evading. |
| co·ev·o·lu·tion (kō'ěv-ə-lōō'shən, -ē-və-) n. The evolution of two or more interdependent species, each adapting to changes in the other. It occurs, for example, between predators and prey and between insects and the flowers that they pollinate. co'ev·o·lu'tion·ar·y adj., co'e·volve' (-ĭ-vŏlv') v. |
The process that occurs when two species influence each other during evolution. For example, an insect may evolve specialized parts that allow it to feed on a specific flower, whereas the flower evolves to facilitate pollination by that particular insect.