tumblebug 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 several dung beetles that roll and bury in soil balls of dung, upon which the females deposit their eggs and in which the larvae develop
tumblebug definition by American Heritage Dictionary
Any of various dung beetles, especially of the genera Canthon and Phanaeus, that roll up balls of fresh dung, inside which the female deposits her eggs and on which the larvae feed.