1. 
   Protohippus
   Protohippus is an extinct genus of horse. ...
   Found op http://en.wikipedia.org/wiki/Protohippus
   
   
2. 
   protohippus
   [n] - Pliocene horse approaching donkeys in size
   Found op http://www.webdictionary.co.uk/definition.php?query=protohippus
   
   
3. 
   Protohippus
   Pro`to·hip'pus noun [ New Latin , from Greek ... first + ... horse.] (Paleon.) A genus of fossil horses from the Lower Pliocene. They had three toes on each foot, the lateral ones being small.
   Found op http://www.encyclo.co.uk/webster/P/181
   
   
4. 
   protohippus
   <paleontology> A genus of fossil horses from the Lower Pliocene. They had three toes on each foot, the lateral ones being small. ... Origin: NL, from Gr. First + horse. ... Source: Websters Dictionary ... (01 Mar 1998) ...
   Found op http://www.mondofacto.com/facts/dictionary?protohippus
   
   
5. 
   protohippus
   noun Pliocene horse approaching donkeys in size
   Found op http://wordnetweb.princeton.edu/perl/webwn?s=protohippus
   
   
6. 
   Protohippus
   • (n.) A genus of fossil horses from the Lower Pliocene. They had three toes on each foot, the lateral ones being small.
   Found op http://thinkexist.com/dictionary/meaning/protohippus/
   
   
7. 
   Protohippus
   Protohippus Related horse-word units: caval-; equ-, equi-.
   Found op http://www.wordinfo.info/words/index/info/view_unit/987/5
   
   
8. 
   protohippus
   1) Equus caballus 2) Horse 3) Pliocene horse approaching donkeys in size
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/protohippus/1
   
   

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