"aggregation number" meaning in English

{
  "forms": [
    {
      "form": "aggregation numbers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "aggregation number (plural aggregation numbers)",
      "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": "Biochemistry",
          "orig": "en:Biochemistry",
          "parents": [
            "Biology",
            "Chemistry",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Liquids",
          "orig": "en:Liquids",
          "parents": [
            "Matter",
            "Chemistry",
            "Nature",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Physical chemistry",
          "orig": "en:Physical chemistry",
          "parents": [
            "Chemistry",
            "Physics",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "en",
          "name": "Physical quantities",
          "orig": "en:Physical quantities",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "the number of molecules that are associated together to form a micelle"
      ],
      "id": "en-aggregation_number-en-noun-OXPhAuGU",
      "links": [
        [
          "biochemistry",
          "biochemistry"
        ],
        [
          "physical chemistry",
          "physical chemistry"
        ],
        [
          "molecule",
          "molecule"
        ],
        [
          "micelle",
          "micelle"
        ]
      ],
      "raw_glosses": [
        "(biochemistry, physical chemistry) the number of molecules that are associated together to form a micelle"
      ],
      "tags": [
        "physical"
      ],
      "topics": [
        "biochemistry",
        "biology",
        "chemistry",
        "microbiology",
        "natural-sciences",
        "physical-sciences"
      ],
      "translations": [
        {
          "alt": "ぎょうしゅうすう",
          "code": "ja",
          "lang": "Japanese",
          "roman": "gyōshūsū",
          "sense": "the number of molecules that are associated together to form a micelle",
          "word": "凝集数"
        }
      ]
    }
  ],
  "word": "aggregation number"
}

{
  "forms": [
    {
      "form": "aggregation numbers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "aggregation number (plural aggregation numbers)",
      "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:Biochemistry",
        "en:Liquids",
        "en:Physical chemistry",
        "en:Physical quantities"
      ],
      "glosses": [
        "the number of molecules that are associated together to form a micelle"
      ],
      "links": [
        [
          "biochemistry",
          "biochemistry"
        ],
        [
          "physical chemistry",
          "physical chemistry"
        ],
        [
          "molecule",
          "molecule"
        ],
        [
          "micelle",
          "micelle"
        ]
      ],
      "raw_glosses": [
        "(biochemistry, physical chemistry) the number of molecules that are associated together to form a micelle"
      ],
      "tags": [
        "physical"
      ],
      "topics": [
        "biochemistry",
        "biology",
        "chemistry",
        "microbiology",
        "natural-sciences",
        "physical-sciences"
      ]
    }
  ],
  "translations": [
    {
      "alt": "ぎょうしゅうすう",
      "code": "ja",
      "lang": "Japanese",
      "roman": "gyōshūsū",
      "sense": "the number of molecules that are associated together to form a micelle",
      "word": "凝集数"
    }
  ],
  "word": "aggregation number"
}