Dictionary.net

• A conical rifle bullet, with a cavity in its base plugged with a piece of iron, which, by the explosion of the charge, is driven farther in, expanding the sides to fit closely the grooves of the barrel.

2010 - New Age Dictionary Database
By Oddity Software

• A conical rifle bullet, with a cavity in its base plugged with a piece of iron, which, by the explosion of the charge, is driven farther in, expanding the sides to fit closely the grooves of the barrel.

1913 - Webster's Revised Unabridged Dictionary
By Noah Webster.