Science Dictionary
convergence   (kən-vûr'jəns)  Pronunciation Key 
  1. Mathematics The property or manner of approaching a limit, such as a point, line, or value.

  2. Biology The evolution of superficially similar structures in unrelated species as they adapt to similar environments. Examples of convergence are the development of fins independently in both fish and whales and of wings in insects, birds, and bats. Also called convergent evolution. Compare divergence.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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