hockey puck

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun ice hockey A small black flat roundel of hardened rubber used as a playing piece in ice hockey to score points by moving the puck into the opponent's goal net.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a vulcanized rubber disk 3 inches in diameter that is used instead of a ball in ice hockey