Advertisement - Continue reading below

Definition of "nephridium" [‖Ne•phrid•i•um]

  • A tubular excretory organ in many invertebrates, such as mollusks and earthworms. (noun)
  • The excretory organ of a vertebrate embryo from which the kidney develops. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Use "nephridium" in a sentence
  • "“Did you get out the nephridium?” he said as graciously as he could."
  • "He sat to the last moment doggedly struggling to keep cool and to mount the ciliated funnel of an earthworm's nephridium."
  • ""Did you get out the nephridium?" he said as graciously as he could."