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Thesaurus: water tube

One of a system of tubular excretory organs having external openings, found in many invertebrates. They are believed to be analogous in function to the kidneys of vertebrates. See Illust. under Trematodea, and Sporocyst.

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  1. One of a system of tubular excretory organs having external openings, found in many invertebrates. They are believed to be analogous in function to the kidneys of vertebrates. See Illust. under Trematodea, and Sporocyst.
  2. n. a boiler tube through which the water flows.
  3. One of a system of tubular excretory organs having external openings, found in many invertebrates. They are believed to be analogous in function to the kidneys of vertebrates. See Illust. under Trematodea, and Sporocyst.
  4. One of a system of tubular excretory organs having externalopenings, found in many invertebrates. They are believed to beanalogous in function to the kidneys of vertebrates. See Illust.under Trematodea, and Sporocyst.