"vanishing locus" meaning in English

{
  "forms": [
    {
      "form": "vanishing loci",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "vanishing loci"
      },
      "expansion": "vanishing locus (plural vanishing loci)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Algebraic geometry",
          "orig": "en:Algebraic geometry",
          "parents": [
            "Algebra",
            "Geometry",
            "Mathematics",
            "Formal sciences",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Synonym of zero locus."
      ],
      "id": "en-vanishing_locus-en-noun-ks3VBbQ~",
      "links": [
        [
          "algebraic geometry",
          "algebraic geometry"
        ],
        [
          "zero locus",
          "zero locus#English"
        ]
      ],
      "raw_glosses": [
        "(algebraic geometry) Synonym of zero locus."
      ],
      "synonyms": [
        {
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "zero locus"
        }
      ],
      "topics": [
        "algebraic-geometry",
        "geometry",
        "mathematics",
        "sciences"
      ]
    }
  ],
  "word": "vanishing locus"
}

{
  "forms": [
    {
      "form": "vanishing loci",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "vanishing loci"
      },
      "expansion": "vanishing locus (plural vanishing loci)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "en:Algebraic geometry"
      ],
      "glosses": [
        "Synonym of zero locus."
      ],
      "links": [
        [
          "algebraic geometry",
          "algebraic geometry"
        ],
        [
          "zero locus",
          "zero locus#English"
        ]
      ],
      "raw_glosses": [
        "(algebraic geometry) Synonym of zero locus."
      ],
      "synonyms": [
        {
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "zero locus"
        }
      ],
      "topics": [
        "algebraic-geometry",
        "geometry",
        "mathematics",
        "sciences"
      ]
    }
  ],
  "word": "vanishing locus"
}