"principal square root" meaning in English

{
  "forms": [
    {
      "form": "principal square roots",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "principal square root (plural principal square roots)",
      "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": "Mathematics",
          "orig": "en:Mathematics",
          "parents": [
            "Formal sciences",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "The positive square root of a number; the positive number which, when squared, yields another number"
      ],
      "id": "en-principal_square_root-en-noun-gq26dvgP",
      "links": [
        [
          "mathematics",
          "mathematics"
        ],
        [
          "positive",
          "positive"
        ],
        [
          "square root",
          "square root"
        ]
      ],
      "raw_glosses": [
        "(mathematics) The positive square root of a number; the positive number which, when squared, yields another number"
      ],
      "related": [
        {
          "word": "square root"
        },
        {
          "word": "principal root"
        }
      ],
      "topics": [
        "mathematics",
        "sciences"
      ]
    }
  ],
  "sounds": [
    {
      "rhymes": "-uːt"
    }
  ],
  "word": "principal square root"
}

{
  "forms": [
    {
      "form": "principal square roots",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "principal square root (plural principal square roots)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "square root"
    },
    {
      "word": "principal root"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Rhymes:English/uːt",
        "Rhymes:English/uːt/5 syllables",
        "en:Mathematics"
      ],
      "glosses": [
        "The positive square root of a number; the positive number which, when squared, yields another number"
      ],
      "links": [
        [
          "mathematics",
          "mathematics"
        ],
        [
          "positive",
          "positive"
        ],
        [
          "square root",
          "square root"
        ]
      ],
      "raw_glosses": [
        "(mathematics) The positive square root of a number; the positive number which, when squared, yields another number"
      ],
      "topics": [
        "mathematics",
        "sciences"
      ]
    }
  ],
  "sounds": [
    {
      "rhymes": "-uːt"
    }
  ],
  "word": "principal square root"
}