from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A mud rich in organic matter formed at the bottom of a body of water.
- n. A fluid slime found in swamps as a product of putrefaction.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. an aquatic sludge-like sediment rich in organic matter formed in stagnant water
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. sludge (rich in organic matter) that accumulates at the bottom of lakes or oceans
sapro- + Greek pēlos, mud.(American Heritage® Dictionary of the English Language, Fourth Edition)
sapro- + Ancient Greek πηλός ("clay") (Wiktionary)