"BHN" meaning in English

{
  "forms": [
    {
      "form": "BHNs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "BHN (plural BHNs)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "Brinell hardness number"
        }
      ],
      "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": "Materials science",
          "orig": "en:Materials science",
          "parents": [
            "Engineering",
            "Sciences",
            "Applied sciences",
            "Technology",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Initialism of Brinell hardness number."
      ],
      "id": "en-BHN-en-noun-sVBg4vCk",
      "links": [
        [
          "materials science",
          "materials science"
        ],
        [
          "Brinell hardness number",
          "Brinell hardness number#English"
        ]
      ],
      "qualifier": "materials science",
      "raw_glosses": [
        "(materials science) Initialism of Brinell hardness number."
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "initialism"
      ]
    }
  ],
  "word": "BHN"
}

{
  "forms": [
    {
      "form": "BHNs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "BHN (plural BHNs)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "Brinell hardness number"
        }
      ],
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English initialisms",
        "English lemmas",
        "English nouns",
        "English words without vowels",
        "en:Materials science"
      ],
      "glosses": [
        "Initialism of Brinell hardness number."
      ],
      "links": [
        [
          "materials science",
          "materials science"
        ],
        [
          "Brinell hardness number",
          "Brinell hardness number#English"
        ]
      ],
      "qualifier": "materials science",
      "raw_glosses": [
        "(materials science) Initialism of Brinell hardness number."
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "initialism"
      ]
    }
  ],
  "word": "BHN"
}