Hy·rac·o·don
| \ hīˈrakəˌdän \
Definition of Hyracodon
: a genus (the type of the family Hyracodontidae) of Eocene and Oligocene perissodactyls related to the rhinoceroses but hornless and of light agile build with all feet three-toed
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Merriam-Webster unabridged
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