A large bullfrog surrounded by lily pads.
bullfrog 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.
a large North American ranid frog (Rana catesbeiana) that has a deep, loud croak
Origin: bull- plush frog
bullfrog definition by American Heritage Dictionary
Any of several large, heavy-bodied frogs, chiefly of the genus Rana and especially R. catesbeiana, native to North America and having a characteristic deep resonant croak.