Discus
Discus, disk thrown in athletic competition. The wooden disk has a smooth metal rim and brass plates set flush within its sides. Discus throwing was popular in classical times as a form of exercise and for athletic contests. The discus, then made of stone or metal, was thrown for distance, with a combination of strength, skill, and grace. The discus thrown by men in modern competition weighs not less than 4 lb 6.5 oz (2 kg). The women's discus weighs 2 lb 3 oz (1 kg).
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21st Century Webster's Family Encyclopedia21st Century Webster's Family Encyclopedia - Diana to Dreadnought