nephridium

nephridium definition - medical

ne·phrid·i·um (nə-frĭdˈē-əm)

noun pl. ne·phrid·i·a (-ē-ə)
The embryonic excretory organ from which the kidney develops.

The American Heritage® Medical Dictionary Copyright © 2009 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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