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Noun: protohippus  ,prow-tow'hi-pus
  1. Pliocene horse approaching donkeys in size

Type of: Equus caballus, horse

Part of: genus Protohippus

Encyclopedia: Protohippus

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protoceratops
protocol
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protoctist family
protoctist genus
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Protoctista
protogeometric
protoheme
protohemin
protohippus
protohistory
protohuman
Proto-Indo European
Proto-Indo European language
protolanguage
protology
protomammal
protomartyr
proton
proton accelerator