noun
edge ball (table tennis)
A ball that hits the edge of the table, often resulting in an unpredictable bounce; considered in play.
エッジボールは不規則なバウンドをするので、返球が難しい。
An edge ball bounces irregularly, making it difficult to return.
Variant with interpunct, sometimes seen in dictionaries or explanatory contexts.
From English 'edge ball', a term used in table tennis.