nephridium

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(nə frid′ē əm)

noun pl. nephridia

  1. a waste-discharging tubule with an external excretory pore, found in many invertebrates, as in worms, mollusks, etc.
  2. any of the excretory tubules of the pronephros of a vertebrate embryo

Origin: ModL < Gr nephridion, dim. of nephros, kidney: see nephro-

Related Forms:

See nephridium in American Heritage Dictionary 4

noun pl. ne·phrid·i·a (-ē-ə)
  1. A tubular excretory organ in many invertebrates, such as mollusks and earthworms.
  2. The excretory organ of a vertebrate embryo from which the kidney develops.

Origin:

Origin: nephr(o)-

Origin: + Latin -idium, diminutive suff. (from Greek -idion)

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Related Forms:

  • ne·phridˈi·al adjective

Learn more about nephridium

nephridium medical definition

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