tampion 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 plug or stopper put in the muzzle of a gun not in use
Origin: French tampon, nasalized form of tapon ; from Frankish an unverified form tappo, akin to tap
tampion definition by American Heritage Dictionary
A plug or cover for the muzzle of a cannon or gun to keep out dust and moisture.
Origin: Middle English, from Old French tampon, variant of tapon, rag for stopping a hole, of Germanic origin.