"upsilon" meaning in French

{
  "etymology_templates": [
    {
      "args": {
        "1": "fr",
        "2": "undefined derivations"
      },
      "expansion": "",
      "name": "cln"
    },
    {
      "args": {
        "1": "fr",
        "2": "grc",
        "3": "ὖ ψιλόν",
        "4": ""
      },
      "expansion": "Ancient Greek ὖ ψιλόν (û psilón)",
      "name": "uder"
    }
  ],
  "etymology_text": "From Ancient Greek ὖ ψιλόν (û psilón).",
  "forms": [
    {
      "form": "upsilon",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m",
        "2": "#"
      },
      "expansion": "upsilon m (plural upsilon)",
      "name": "fr-noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "noun",
  "senses": [
    {
      "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"
        },
        {
          "kind": "topical",
          "langcode": "fr",
          "name": "Greek letter names",
          "orig": "fr:Greek letter names",
          "parents": [
            "Letter names",
            "Letters, symbols, and punctuation",
            "Names",
            "Orthography",
            "All topics",
            "Proper nouns",
            "Terms by semantic function",
            "Writing",
            "Fundamental",
            "Nouns",
            "Human behaviour",
            "Language",
            "Lemmas",
            "Human",
            "Communication"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "upsilon (Greek letter)"
      ],
      "id": "en-upsilon-fr-noun-r9ilxVWG",
      "links": [
        [
          "upsilon",
          "upsilon#English"
        ]
      ],
      "synonyms": [
        {
          "word": "i grec"
        }
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/yp.si.lɔ̃/"
    },
    {
      "ipa": "/yp.si.lɔn/"
    }
  ],
  "word": "upsilon"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "fr",
        "2": "undefined derivations"
      },
      "expansion": "",
      "name": "cln"
    },
    {
      "args": {
        "1": "fr",
        "2": "grc",
        "3": "ὖ ψιλόν",
        "4": ""
      },
      "expansion": "Ancient Greek ὖ ψιλόν (û psilón)",
      "name": "uder"
    }
  ],
  "etymology_text": "From Ancient Greek ὖ ψιλόν (û psilón).",
  "forms": [
    {
      "form": "upsilon",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m",
        "2": "#"
      },
      "expansion": "upsilon m (plural upsilon)",
      "name": "fr-noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "French 3-syllable words",
        "French countable nouns",
        "French entries with incorrect language header",
        "French lemmas",
        "French masculine nouns",
        "French nouns",
        "French terms derived from Ancient Greek",
        "French terms with IPA pronunciation",
        "French undefined derivations",
        "fr:Greek letter names"
      ],
      "glosses": [
        "upsilon (Greek letter)"
      ],
      "links": [
        [
          "upsilon",
          "upsilon#English"
        ]
      ],
      "synonyms": [
        {
          "word": "i grec"
        }
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/yp.si.lɔ̃/"
    },
    {
      "ipa": "/yp.si.lɔn/"
    }
  ],
  "word": "upsilon"
}