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retrognathism

[ rĕt′rō-năthĭz′əm ]
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n.

A condition of facial disharmony in which one or both jaws are posterior to their normal positions.

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On the farm, the feed for chicks is significantly different from the roosters’; ______ not even comparable.
ret′ro•gnathic adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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