artiodactyl
top: four-toed foot of a hippopotamus
bottom: two-toed foot of a giraffe
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

The hippopotamus is an artiodactyl.
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