disc

A round flat shape or object — for example a small metal plate you can hold, a plastic counter in a game, or the round shape the moon makes in the sky.
圓盤;圓形扁平物
"Three keys hang from a small metal disc on Leo's bag."

A round flat shape or object — for example a small metal plate you can hold, a plastic counter in a game, or the round shape the moon makes in the sky.
圓盤;圓形扁平物
"Three keys hang from a small metal disc on Leo's bag."