from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A hollow cell in the excretory system of certain invertebrates, including flatworms and rotifers, containing a tuft of rapidly beating cilia that serve to propel waste products into excretory tubules.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. organ of excretion in flatworms
Sorry, no etymologies found.