• Webster's Revised Unabridged Dictionary
    • Toxodonta (Paleon) An extinct order of Mammalia found in the South American Tertiary formation. The incisor teeth were long and curved and provided with a persistent pulp. They are supposed to be related both to the rodents and ungulates. Called also Toxodontia.
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Century Dictionary and Cyclopedia
    • n toxodonta An order of fossil subungulate quadrupeds, or a suborder of Taxeopoda, named from the genus Toxodon. It covers some generalized South American forms exhibiting cross-relationships with perissodactyls, proboscideans, and rodents, and whose common characters are as yet indeterminate.
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Webster's Revised Unabridged Dictionary