"surface normal" meaning in English

{
  "forms": [
    {
      "form": "surface normals",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "surface normal (plural surface normals)",
      "name": "en-noun"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
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          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Differential geometry",
          "orig": "en:Differential geometry",
          "parents": [
            "Geometry",
            "Mathematical analysis",
            "Mathematics",
            "Formal sciences",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "⃑n=±⃑x_u×⃑x_v/ lVert ⃑x_u×⃑x_v rVert"
        }
      ],
      "glosses": [
        "A unit vector at any given point P of a surface M which is perpendicular to the tangent plane T_P(M) of M at P. For a surface with parametrization ⃑x(u,v), it is given by"
      ],
      "id": "en-surface_normal-en-noun-oEBmZLQZ",
      "links": [
        [
          "differential geometry",
          "differential geometry"
        ],
        [
          "tangent plane",
          "tangent plane"
        ]
      ],
      "qualifier": "differential geometry",
      "raw_glosses": [
        "(differential geometry) A unit vector at any given point P of a surface M which is perpendicular to the tangent plane T_P(M) of M at P. For a surface with parametrization ⃑x(u,v), it is given by"
      ],
      "wikipedia": [
        "surface normal"
      ]
    }
  ],
  "word": "surface normal"
}

{
  "forms": [
    {
      "form": "surface normals",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "surface normal (plural surface normals)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
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        "en:Differential geometry"
      ],
      "examples": [
        {
          "text": "⃑n=±⃑x_u×⃑x_v/ lVert ⃑x_u×⃑x_v rVert"
        }
      ],
      "glosses": [
        "A unit vector at any given point P of a surface M which is perpendicular to the tangent plane T_P(M) of M at P. For a surface with parametrization ⃑x(u,v), it is given by"
      ],
      "links": [
        [
          "differential geometry",
          "differential geometry"
        ],
        [
          "tangent plane",
          "tangent plane"
        ]
      ],
      "qualifier": "differential geometry",
      "raw_glosses": [
        "(differential geometry) A unit vector at any given point P of a surface M which is perpendicular to the tangent plane T_P(M) of M at P. For a surface with parametrization ⃑x(u,v), it is given by"
      ],
      "wikipedia": [
        "surface normal"
      ]
    }
  ],
  "word": "surface normal"
}