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ectodermosis

[ ĕk′tō-dər-mōsĭs ]
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n. pl. ec•to•der•mo•ses (-sēz)
A disorder of an organ or tissue developed from the ectoderm.
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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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