(Zool.) 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.
![]() |
![]() |
![]() | ![]() | ![]() | |||
|
|
|
![]() |
"Water tube" Quotes from Famous Books ![]() ![]() — Scientific American Supplement, No. 1178, June 25, 1898 • Various |
Copyright © 2025 Free Translator.org |