A pile of earthworms.
earthworm definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
any of a number of oligochaetous worms that burrow in the soil, esp. any of a genus (Lumbricus) very important in aerating and fertilizing the soil
earthworm definition by American Heritage Dictionary
Any of various terrestrial annelid worms of the class Oligochaeta, especially those of the family Lumbricidae, that burrow into and help aerate and enrich soil.