ne·​phrid·​i·​um | \ ni-ˈfri-dē-əm How to pronounce nephridium (audio) \
plural nephridia\ ni-​ˈfri-​dē-​ə How to pronounce nephridium (audio) \

Definition of nephridium

: a tubular glandular excretory organ characteristic of various invertebrates

Other Words from nephridium

nephridial \ ni-​ˈfri-​dē-​əl How to pronounce nephridium (audio) \ adjective

First Known Use of nephridium

1877, in the meaning defined above

History and Etymology for nephridium

New Latin

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The first known use of nephridium was in 1877

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Cite this Entry

“Nephridium.” Dictionary, Merriam-Webster, Accessed 7 May. 2021.

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More Definitions for nephridium


ne·​phrid·​i·​um | \ ni-ˈfrid-ē-əm How to pronounce nephridium (audio) \
plural nephridia\ -​ē-​ə How to pronounce nephridium (audio) \

Medical Definition of nephridium

: an excretory organ that is characteristic of various coelomate invertebrates (as annelid worms, mollusks, brachiopods, and some arthropods), occurs paired in each body segment or as a single pair serving the whole body, typically consists of a tube opening at one end into the coelom and discharging at the other end on the exterior of the body, is often lengthened and convoluted, and has glandular walls

Other Words from nephridium

nephridial \ -​ē-​əl How to pronounce nephridium (audio) \ adjective

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