"myrio-" meaning in French

{
  "etymology_templates": [
    {
      "args": {
        "1": "fr",
        "2": "grc",
        "3": "μυρίος",
        "4": "",
        "5": "ten thousand"
      },
      "expansion": "Ancient Greek μυρίος (muríos, “ten thousand”)",
      "name": "uder"
    }
  ],
  "etymology_text": "From Ancient Greek μυρίος (muríos, “ten thousand”).",
  "head_templates": [
    {
      "args": {},
      "expansion": "myrio-",
      "name": "fr-prefix"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "prefix",
  "senses": [
    {
      "alt_of": [
        {
          "word": "myria-"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "French entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "French undefined derivations",
          "parents": [
            "Undefined derivations",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Alternative form of myria-"
      ],
      "id": "en-myrio--fr-prefix-qIf1nfr7",
      "links": [
        [
          "myria-",
          "myria-#French"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative",
        "morpheme"
      ]
    }
  ],
  "word": "myrio-"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "fr",
        "2": "grc",
        "3": "μυρίος",
        "4": "",
        "5": "ten thousand"
      },
      "expansion": "Ancient Greek μυρίος (muríos, “ten thousand”)",
      "name": "uder"
    }
  ],
  "etymology_text": "From Ancient Greek μυρίος (muríos, “ten thousand”).",
  "head_templates": [
    {
      "args": {},
      "expansion": "myrio-",
      "name": "fr-prefix"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "prefix",
  "senses": [
    {
      "alt_of": [
        {
          "word": "myria-"
        }
      ],
      "categories": [
        "French entries with incorrect language header",
        "French lemmas",
        "French prefixes",
        "French terms derived from Ancient Greek",
        "French undefined derivations"
      ],
      "glosses": [
        "Alternative form of myria-"
      ],
      "links": [
        [
          "myria-",
          "myria-#French"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative",
        "morpheme"
      ]
    }
  ],
  "word": "myrio-"
}