"nitrum" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "la",
        "3": "nitrum"
      },
      "expansion": "Latin nitrum",
      "name": "bor"
    }
  ],
  "etymology_text": "From Latin nitrum. Doublet of nitre and natron.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "nitrum (uncountable)",
      "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": "Chemistry",
          "orig": "en:Chemistry",
          "parents": [
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "derived": [
        {
          "word": "nitrum flammans"
        }
      ],
      "glosses": [
        "niter"
      ],
      "id": "en-nitrum-en-noun-zP5o-3zc",
      "links": [
        [
          "chemistry",
          "chemistry"
        ],
        [
          "niter",
          "niter"
        ]
      ],
      "raw_glosses": [
        "(chemistry, obsolete) niter"
      ],
      "tags": [
        "obsolete",
        "uncountable"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "physical-sciences"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈnaɪtɹəm/"
    }
  ],
  "word": "nitrum"
}

{
  "derived": [
    {
      "word": "nitrum flammans"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "la",
        "3": "nitrum"
      },
      "expansion": "Latin nitrum",
      "name": "bor"
    }
  ],
  "etymology_text": "From Latin nitrum. Doublet of nitre and natron.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "nitrum (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English 2-syllable words",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms borrowed from Latin",
        "English terms derived from Latin",
        "English terms with IPA pronunciation",
        "English terms with obsolete senses",
        "English uncountable nouns",
        "en:Chemistry"
      ],
      "glosses": [
        "niter"
      ],
      "links": [
        [
          "chemistry",
          "chemistry"
        ],
        [
          "niter",
          "niter"
        ]
      ],
      "raw_glosses": [
        "(chemistry, obsolete) niter"
      ],
      "tags": [
        "obsolete",
        "uncountable"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "physical-sciences"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈnaɪtɹəm/"
    }
  ],
  "word": "nitrum"
}