Wiktionary
n. A bouncy ball designed for the sport of tennis. A rubber, hollow ball, pressurized and covered with felt. Most common color is "Optic Yellow", but many colors exist today.
WordNet
n. ball about the size of a fist used in playing tennis
Wikipedia
A tennis ball is a ball designed for the sport of tennis. Tennis balls are fluorescent yellow at major sporting events, but in recreational play can be virtually any color. Tennis balls are covered in a fibrous felt which modifies their aerodynamic properties, and each has a white curvilinear oval covering it.
Usage examples of "tennis ball".
Every last football, baseball, tennis ball, basketball, volleyball, golfball, shot put, softball, squash ball, soccer ball, pool ball, bowling ball, even croquet and polo balls, all of them.
Chuck tossed a tennis ball idly, squeezing it when it returned to his palm.
And with a sign of feigned content, the obnoxious lady sank down on the grass and looked up at the sky as she leaned back on her splayed-out hands, and presently an old gray tennis ball bounced over her, and Lo’.
The companionship of others did not mean much to him, and he took real pleasure in his constant search after perfection in placing a tennis ball exactly where he wanted it.
I told myself the pale oval was a tennis ball and this was the serve that was going to decide the match.
Meanwhile, the cop's fingers went on working the tennis ball —.
Once the train gets moving, you accept that the tennis ball travels at 75 feet per second (from the point of view of the observer on the ground).
Then she flipped up a tennis ball, reared back, and let fly a ferocious serve that slammed against the wall with a resounding thwack.
Once triggered, the empathin rush was like a volleyed tennis ball, building intensity with every rebound from one inflamed sensorium to the other, until the merge reached a climax just short of unbearable.
He wore shorts and a V-necked sweater and played with the indolent ease of someone who had been given his first tennis ball in the crib.