The term METAL MARBLE is a combination of two words, STEELIE and MARBLE. STEELIE is a seven-letter word that refers to a type of toy consisting of a steel ball bearing inside a metal or plastic shell. It is often used in a game of skill where the player attempts to land the steelie in a target area. MARBLE is a small, round object made from glass, stone, or other materials. It is often used in games such as marbles, where players attempt to knock their opponents' marbles out of a circle. Together, METAL MARBLE refers to a toy consisting of a steel ball bearing inside a metal or plastic shell, similar to a MARBLE.