[ bawl-peen ]
/ ˈbɔlˌpin /
a hammer having a hemispherical peen (ball peen) for beating metal.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for ball-peen hammer
a hammer that has one end of its head shaped in a hemisphere for beating metal, etc
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012