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Pronunciation varies by accent · adjective
(tennis) Describing a tennis ball having a thinner felt woven more tightly around the ball's core, designed for softer court surfaces such as clay..
Coordinate term: extra-duty
The men at the U.S. Open use what is known as an “extra-duty” ball, which means the felt on the outside of the ball is woven slightly more loosely than the “regular-duty” ball the women use. […] However, the regular-duty balls “play faster,” Collins said through a spokeswoman for the company.
Use regular-duty when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Regular-duty means (tennis) Describing a tennis ball having a thinner felt woven more tightly around the ball's core, designed for softer court surfaces such as clay..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Coordinate term: extra-duty
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