Acinonyx
noun
Acin·o·nyx
ə-ˈsi-nə-ˌniks
: the genus of cats comprising the cheetahs which are distinguished by the absence of cutaneous sheaths for guarding the claws
Word History
Etymology
New Latin, from Greek akinētos motionless + New Latin -onyx
First Known Use
1914, in the meaning defined above