"litoptern" meaning in English

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        "5": "smooth"
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      "expansion": "Ancient Greek λῑτός (lītós, “smooth”)",
      "name": "der"
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  "etymology_text": "From modern Latin Litopterna (order name), from Ancient Greek λῑτός (lītós, “smooth”) + πτέρνη (ptérnē, “heel-bone”).",
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    {
      "form": "litopterns",
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        "plural"
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          "name": "Zoology",
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      "examples": [
        {
          "ref": "2022, Thomas Halliday, Otherworlds, Penguin, published 2023, page 73:",
          "text": "[C]ertain litopterns like the camel-like Macrauchenia also lived on until within 15,000 years before the present.",
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        "An extinct hoofed mammal of the order †Litopterna, from the Cenozoic period."
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        "(zoology) An extinct hoofed mammal of the order †Litopterna, from the Cenozoic period."
      ],
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        "biology",
        "natural-sciences",
        "zoology"
      ],
      "wikipedia": [
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      "ipa": "/lɪˈtɒptəːn/",
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        "(zoology) An extinct hoofed mammal of the order †Litopterna, from the Cenozoic period."
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