"yFBS" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "?"
      },
      "expansion": "yFBS",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "father's brother's son younger than oneself",
          "word": "younger father's brother's son"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with language name categories using raw markup",
          "parents": [
            "Entries with language name categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Anthropology",
          "orig": "en:Anthropology",
          "parents": [
            "Social sciences",
            "Zoology",
            "Sciences",
            "Society",
            "Biology",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1989, Chinese University of Hong Kong. New Asia College, 新亞學術集刊",
          "text": "In Ego's own generation , all cousins are called by the same terms as ego's own siblings : adax = OB = OFBS = OFZS = OMZS = OFZS muoluo = OBW = OFBSW = OFZSW = OMBSW = OMZSW ( adaz older than ego ) nexmuo = YB = YFBS = YFZS = YMBS[…]",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Initialism of younger father's brother's son.; father's brother's son younger than oneself"
      ],
      "id": "en-yFBS-en-noun-en:anth",
      "links": [
        [
          "anthropology",
          "anthropology"
        ],
        [
          "younger",
          "younger#English"
        ],
        [
          "father",
          "father#English"
        ],
        [
          "brother",
          "brother#English"
        ],
        [
          "son",
          "son#English"
        ]
      ],
      "raw_glosses": [
        "(anthropology) Initialism of younger father's brother's son.; father's brother's son younger than oneself"
      ],
      "senseid": [
        "en:anth"
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "initialism"
      ],
      "topics": [
        "anthropology",
        "human-sciences",
        "sciences"
      ]
    }
  ],
  "word": "yFBS"
}

{
  "head_templates": [
    {
      "args": {
        "1": "?"
      },
      "expansion": "yFBS",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "father's brother's son younger than oneself",
          "word": "younger father's brother's son"
        }
      ],
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with language name categories using raw markup",
        "English initialisms",
        "English lemmas",
        "English nouns",
        "English nouns with unknown or uncertain plurals",
        "English terms with quotations",
        "en:Anthropology"
      ],
      "examples": [
        {
          "ref": "1989, Chinese University of Hong Kong. New Asia College, 新亞學術集刊",
          "text": "In Ego's own generation , all cousins are called by the same terms as ego's own siblings : adax = OB = OFBS = OFZS = OMZS = OFZS muoluo = OBW = OFBSW = OFZSW = OMBSW = OMZSW ( adaz older than ego ) nexmuo = YB = YFBS = YFZS = YMBS[…]",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Initialism of younger father's brother's son.; father's brother's son younger than oneself"
      ],
      "links": [
        [
          "anthropology",
          "anthropology"
        ],
        [
          "younger",
          "younger#English"
        ],
        [
          "father",
          "father#English"
        ],
        [
          "brother",
          "brother#English"
        ],
        [
          "son",
          "son#English"
        ]
      ],
      "raw_glosses": [
        "(anthropology) Initialism of younger father's brother's son.; father's brother's son younger than oneself"
      ],
      "senseid": [
        "en:anth"
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "initialism"
      ],
      "topics": [
        "anthropology",
        "human-sciences",
        "sciences"
      ]
    }
  ],
  "word": "yFBS"
}