oil pan 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.
the lower part of the crankcase of an internal-combustion engine, serving as a lubricating-oil reservoir
oil pan definition by American Heritage Dictionary
The bottom of the crankcase in an internal-combustion engine, serving as an oil reservoir.