Greyhound

n. swift breed of dog with a tall slender body

The Greyhound is a breed of dog that has been primarily bred for  companionship, coursing game and racing. The Greyhound is the second fastest-accelerating land mammal, beaten only by the cheetah; a combination of long, powerful legs, deep chest and aerodynamic build allows it to reach speeds of up to 45 mph in less than one and a half seconds, or within 3 strides.
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Noun
1. a tall slender dog of an ancient breed noted for swiftness and keen sight; used as a racing dog
(hypernym) hound, hound dog
(hyponym) Italian greyhound

n. greyhound, swift breed of dog with a tall slender body

(n.)
A slender, graceful breed of dogs, remarkable for keen sight and swiftness. It is one of the oldest varieties known, and is figured on the Egyptian monuments.