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Rathke

[ rätkə ]
Martin Heinrich 1793-1860
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German biologist who discovered gill slits and branchial arches in bird and mammal embryos.
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Which of the following nouns has an irregular plural form?
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

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