water tube
📖 中文释义
- [机] 水管
🔗 释义中的汉语词
📘 English Definition（英文释义）
- 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.