blister copper: an impure form of copper having a black blistered surface
copper: a ductile malleable reddish-brown corrosion-resistant diamagnetic metallic element; occurs in various minerals but is the only metal that occurs abundantly in large masses; used as an electrical and thermal conductor
musical chairs: a child's game in which players march to music around a group of chairs that contains one chair less than the number of players; when the music abruptly stops the players scramble to sit and the player who does not find a chair is eliminated; then a chair is removed and the march resumes until only the winner is seated