pipe wrench 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 types of wrench, including the Stillson wrench, used to grip and turn pipes and other cylindrical objects
pipe wrench definition by American Heritage Dictionary
A wrench with two serrated jaws, one adjustable, for gripping and turning pipe.