"true density" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "?"
      },
      "expansion": "true density",
      "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": "other",
          "name": "English entries with topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Materials",
          "orig": "en:Materials",
          "parents": [
            "Manufacturing",
            "Human activity",
            "Human behaviour",
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Sciences",
          "orig": "en:Sciences",
          "parents": [
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "The density of the particles that make up a powder or particulate solid, in contrast to bulk density, which measures the average density of a large volume of the powder in a specific medium (usually air)."
      ],
      "id": "en-true_density-en-noun-Dt1vE6Z7",
      "links": [
        [
          "sciences",
          "sciences"
        ],
        [
          "bulk density",
          "bulk density"
        ]
      ],
      "raw_glosses": [
        "(sciences) The density of the particles that make up a powder or particulate solid, in contrast to bulk density, which measures the average density of a large volume of the powder in a specific medium (usually air)."
      ],
      "synonyms": [
        {
          "word": "particle density"
        }
      ],
      "topics": [
        "sciences"
      ]
    }
  ],
  "word": "true density"
}

{
  "head_templates": [
    {
      "args": {
        "1": "?"
      },
      "expansion": "true density",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with topic categories using raw markup",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English nouns with unknown or uncertain plurals",
        "English terms with non-redundant non-automated sortkeys",
        "en:Materials",
        "en:Sciences"
      ],
      "glosses": [
        "The density of the particles that make up a powder or particulate solid, in contrast to bulk density, which measures the average density of a large volume of the powder in a specific medium (usually air)."
      ],
      "links": [
        [
          "sciences",
          "sciences"
        ],
        [
          "bulk density",
          "bulk density"
        ]
      ],
      "raw_glosses": [
        "(sciences) The density of the particles that make up a powder or particulate solid, in contrast to bulk density, which measures the average density of a large volume of the powder in a specific medium (usually air)."
      ],
      "topics": [
        "sciences"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "particle density"
    }
  ],
  "word": "true density"
}