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[re-truh-gresh-uh n] /ˌrɛ trəˈgrɛʃ ən/
the act of retrogressing; movement backward.
Biology. degeneration; retrograde metamorphosis; passing from a more complex to a simpler structure.

retrogression ret·ro·gres·sion (rět’rə-grěsh’ən)

The act or process of deteriorating or declining.

A return to a less complex biological state or stage.


Read Also:

  • Retrogressive

    [re-truh-gres-iv] /ˌrɛ trəˈgrɛs ɪv/ adjective 1. characterized by retrogression; degenerating.

  • Retrohyoid bursa

    retrohyoid bursa ret·ro·hy·oid bursa (rět’rō-hī’oid’) n. A bursa between the posterior surface of the body of the hyoid bone and the thyrohyoid membrane. Also called Boyer’s bursa.

  • Retroject

    verb 1. (transitive) to throw backwards

  • Retrojection

    retrojection ret·ro·jec·tion (rět’rə-jěk’shən) n. The washing out of a cavity using the backward flow of an injected fluid.

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