"diatessaron" meaning in Latin

{
  "etymology_templates": [
    {
      "args": {
        "1": "la",
        "2": "grc",
        "3": "διά"
      },
      "expansion": "Ancient Greek διά (diá)",
      "name": "der"
    }
  ],
  "etymology_text": "From Ancient Greek διά (diá) τεσσάρων (tessárōn) \"every fourth\".",
  "forms": [
    {
      "form": "diatessarōn",
      "tags": [
        "canonical",
        "neuter"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "diatessarōn",
        "g": "n",
        "indecl": "yes"
      },
      "expansion": "diatessarōn n (indeclinable)",
      "name": "la-noun"
    }
  ],
  "lang": "Latin",
  "lang_code": "la",
  "pos": "noun",
  "related": [
    {
      "_dis1": "0 0",
      "word": "diapāsōn"
    },
    {
      "_dis1": "0 0",
      "word": "diapente"
    }
  ],
  "senses": [
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "la",
          "name": "Music",
          "orig": "la:Music",
          "parents": [
            "Art",
            "Sound",
            "Culture",
            "Energy",
            "Society",
            "Nature",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "a fourth"
      ],
      "id": "en-diatessaron-la-noun-KBpVqbZ7",
      "links": [
        [
          "music",
          "music"
        ],
        [
          "fourth",
          "fourth"
        ]
      ],
      "raw_glosses": [
        "(music) a fourth"
      ],
      "tags": [
        "indeclinable"
      ],
      "topics": [
        "entertainment",
        "lifestyle",
        "music"
      ]
    },
    {
      "categories": [
        {
          "_dis": "2 36 17 4 40",
          "kind": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "2 36 21 3 38",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "12 88",
          "kind": "other",
          "name": "Latin entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "4 96",
          "kind": "topical",
          "langcode": "la",
          "name": "Medicine",
          "orig": "la:Medicine",
          "parents": [
            "Biology",
            "Healthcare",
            "Sciences",
            "Health",
            "All topics",
            "Body",
            "Fundamental"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "a medicine made of four ingredients."
      ],
      "id": "en-diatessaron-la-noun-xuRnnbEP",
      "links": [
        [
          "medicine",
          "medicine"
        ]
      ],
      "tags": [
        "indeclinable"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/di.aˈtes.sa.roːn/",
      "tags": [
        "Classical-Latin"
      ]
    },
    {
      "ipa": "[d̪iäˈt̪ɛs̠ːäroːn]",
      "tags": [
        "Classical-Latin"
      ]
    },
    {
      "ipa": "/di.aˈtes.sa.ron/",
      "note": "modern Italianate Ecclesiastical"
    },
    {
      "ipa": "[d̪iäˈt̪ɛsːäron]",
      "note": "modern Italianate Ecclesiastical"
    }
  ],
  "word": "diatessaron"
}

{
  "categories": [
    "Latin 5-syllable words",
    "Latin entries with incorrect language header",
    "Latin indeclinable nouns",
    "Latin lemmas",
    "Latin neuter indeclinable nouns",
    "Latin neuter nouns",
    "Latin nouns",
    "Latin terms derived from Ancient Greek",
    "Latin terms with IPA pronunciation",
    "Pages with 2 entries",
    "Pages with entries",
    "la:Medicine"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "la",
        "2": "grc",
        "3": "διά"
      },
      "expansion": "Ancient Greek διά (diá)",
      "name": "der"
    }
  ],
  "etymology_text": "From Ancient Greek διά (diá) τεσσάρων (tessárōn) \"every fourth\".",
  "forms": [
    {
      "form": "diatessarōn",
      "tags": [
        "canonical",
        "neuter"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "diatessarōn",
        "g": "n",
        "indecl": "yes"
      },
      "expansion": "diatessarōn n (indeclinable)",
      "name": "la-noun"
    }
  ],
  "lang": "Latin",
  "lang_code": "la",
  "pos": "noun",
  "related": [
    {
      "word": "diapāsōn"
    },
    {
      "word": "diapente"
    }
  ],
  "senses": [
    {
      "categories": [
        "la:Music"
      ],
      "glosses": [
        "a fourth"
      ],
      "links": [
        [
          "music",
          "music"
        ],
        [
          "fourth",
          "fourth"
        ]
      ],
      "raw_glosses": [
        "(music) a fourth"
      ],
      "tags": [
        "indeclinable"
      ],
      "topics": [
        "entertainment",
        "lifestyle",
        "music"
      ]
    },
    {
      "glosses": [
        "a medicine made of four ingredients."
      ],
      "links": [
        [
          "medicine",
          "medicine"
        ]
      ],
      "tags": [
        "indeclinable"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/di.aˈtes.sa.roːn/",
      "tags": [
        "Classical-Latin"
      ]
    },
    {
      "ipa": "[d̪iäˈt̪ɛs̠ːäroːn]",
      "tags": [
        "Classical-Latin"
      ]
    },
    {
      "ipa": "/di.aˈtes.sa.ron/",
      "note": "modern Italianate Ecclesiastical"
    },
    {
      "ipa": "[d̪iäˈt̪ɛsːäron]",
      "note": "modern Italianate Ecclesiastical"
    }
  ],
  "word": "diatessaron"
}