1. 
   Pliohippus
   Pli`o·hip'pus noun [ New Latin , from English plio cene + Greek ... horse.] (Paleon.) An extinct genus of horses from the Pliocene deposits. Each foot had a single toe (or hoof), as in the common horse.
   Found op http://www.encyclo.co.uk/webster/P/108
   
   
2. 
   pliohippus
   <paleontology> An extinct genus of horses from the Pliocene deposits. Each foot had a single toe (or hoof), as in the common horse. ... Origin: NL, fr. E. Pliocene + Gr. Horse. ... Source: Websters Dictionary ... (01 Mar 1998) ...
   Found op http://www.mondofacto.com/facts/dictionary?pliohippus
   
   
3. 
   Pliohippus
   • (n.) An extinct genus of horses from the Pliocene deposits. Each foot had a single toe (or hoof), as in the common horse.
   Found op http://thinkexist.com/dictionary/meaning/pliohippus/
   
   
4. 
   Pliohippus
   extinct genus of primitive horses that inhabited North America during the Pliocene Epoch (from 5.3 to 1.6 million years ago). Pliohippus, the first ...
   Found op http://www.britannica.com/eb/a-z/p/80
   
   
5. 
   Pliohippus
   Pliohippus is an extinct genus of Equidae, the "horse family". Pliohippus arose in the middle Miocene, around 5 million years ago, in the Pliocene Epoch. It was similar in appearance to Equus,{Citation needed|date=January 2009} but had two long extra toes on both sides of the hoof, externally barel...
   Found op http://en.wikipedia.org/wiki/Pliohippus
   
   

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