from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The coelom formed from a pocketlike outgrowth of the wall of the archenteron, especially in echinoderms and chordates.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A perivisceral cavity which arises as an outgrowth or outgrowths from the digestive tract.
Ancient Greek an intestine + a hollow. (Wiktionary)