Acinonyx

Part of speech: noun

Definitions

1. A genus of large, slender cats known for their exceptional speed
2. a species commonly known as the cheetah, recognized for its unique adaptations for sprinting
3. a member of the Felidae family that primarily inhabits African savannahs and open landscapes

Etymology: Acinonyx is the scientific genus name for the cheetah, and it was built from Greek roots that describe the animal's inability to retract its claws. "Akis" meant a point or sharp tip, and "onyx," the same word that gave us the gemstone, meant claw or nail. Put together, the name means something like "non-moving claw," a reference to the fact that, unlike most cats, cheetahs cannot pull their claws fully back into their paws. Those semi-retractable claws act like cleats, giving the animal extra grip while it sprints. The name was coined by the naturalist Johann Christian Polycarp Erxleben, who published it in 1777 in a classification of mammals. He chose a Greek description rather than a Latin one, which is typical of scientific naming in that period, when Greek was the preferred language for technical terms.

Synonyms: cheetah