protohippus
pro·to·hip·pus
noun
1.
Pliocene horse approaching donkeys in size
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WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
pro·to·hip·pus
Pliocene horse approaching donkeys in size
WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.