"FCY" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "?"
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      "expansion": "FCY",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "full course yellow"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
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          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Motor racing",
          "orig": "en:Motor racing",
          "parents": [
            "Automotive",
            "Sports",
            "Transport",
            "Human activity",
            "All topics",
            "Human behaviour",
            "Fundamental",
            "Human"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Abbreviation of full course yellow."
      ],
      "id": "en-FCY-en-noun-abY2ckLI",
      "links": [
        [
          "motor racing",
          "motor racing"
        ],
        [
          "full course yellow",
          "full course yellow#English"
        ]
      ],
      "raw_glosses": [
        "(motor racing) Abbreviation of full course yellow."
      ],
      "tags": [
        "abbreviation",
        "alt-of"
      ],
      "topics": [
        "hobbies",
        "lifestyle",
        "motor-racing",
        "racing",
        "sports"
      ]
    }
  ],
  "word": "FCY"
}

{
  "head_templates": [
    {
      "args": {
        "1": "?"
      },
      "expansion": "FCY",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "full course yellow"
        }
      ],
      "categories": [
        "English abbreviations",
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English nouns with unknown or uncertain plurals",
        "en:Motor racing"
      ],
      "glosses": [
        "Abbreviation of full course yellow."
      ],
      "links": [
        [
          "motor racing",
          "motor racing"
        ],
        [
          "full course yellow",
          "full course yellow#English"
        ]
      ],
      "raw_glosses": [
        "(motor racing) Abbreviation of full course yellow."
      ],
      "tags": [
        "abbreviation",
        "alt-of"
      ],
      "topics": [
        "hobbies",
        "lifestyle",
        "motor-racing",
        "racing",
        "sports"
      ]
    }
  ],
  "word": "FCY"
}