equus

from WordNet (r) 3.0 (2006)
Equus
    n 1: type genus of the Equidae: only surviving genus of the
         family Equidae [syn: {Equus}, {genus Equus}]
from The Collaborative International Dictionary of English v.0.48
Equus \E"quus\, n. [L., horse.] (Zo["o]l.)
   A genus of mammals, including the horse, ass, etc.
   [1913 Webster]
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