"Smith chart" meaning in English

{
  "etymology_text": "Invented by Phillip H. Smith (1905–1987).",
  "forms": [
    {
      "form": "Smith charts",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Smith chart (plural Smith charts)",
      "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 language name categories using raw markup",
          "parents": [
            "Entries with language name 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": "Engineering",
          "orig": "en:Engineering",
          "parents": [
            "Applied sciences",
            "Technology",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A nomogram displaying impedances, admittances, etc., used by engineers to assist in solving problems with transmission lines and matching circuits."
      ],
      "id": "en-Smith_chart-en-noun-W1~0vlRj",
      "links": [
        [
          "nomogram",
          "nomogram"
        ],
        [
          "impedance",
          "impedance"
        ],
        [
          "admittance",
          "admittance"
        ],
        [
          "engineer",
          "engineer"
        ]
      ],
      "wikipedia": [
        "Smith chart"
      ]
    }
  ],
  "word": "Smith chart"
}

{
  "etymology_text": "Invented by Phillip H. Smith (1905–1987).",
  "forms": [
    {
      "form": "Smith charts",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Smith chart (plural Smith charts)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with language name categories using raw markup",
        "English eponyms",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with non-redundant non-automated sortkeys",
        "en:Engineering"
      ],
      "glosses": [
        "A nomogram displaying impedances, admittances, etc., used by engineers to assist in solving problems with transmission lines and matching circuits."
      ],
      "links": [
        [
          "nomogram",
          "nomogram"
        ],
        [
          "impedance",
          "impedance"
        ],
        [
          "admittance",
          "admittance"
        ],
        [
          "engineer",
          "engineer"
        ]
      ],
      "wikipedia": [
        "Smith chart"
      ]
    }
  ],
  "word": "Smith chart"
}