"Gray code" meaning in English

{
  "etymology_text": "Named after Bell Labs researcher Frank Gray, who invented this system in 1953.",
  "forms": [
    {
      "form": "Gray codes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Gray code (plural Gray codes)",
      "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": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "A binary coding system in which successive values differ in just one digit position."
      ],
      "id": "en-Gray_code-en-noun-BRDnLEBB",
      "links": [
        [
          "binary",
          "binary"
        ],
        [
          "coding",
          "coding"
        ],
        [
          "system",
          "system"
        ],
        [
          "successive",
          "successive"
        ],
        [
          "digit",
          "digit"
        ]
      ],
      "related": [
        {
          "word": "Beckett-Gray code"
        },
        {
          "word": "Gillham code"
        }
      ],
      "wikipedia": [
        "Bell Labs",
        "Frank Gray",
        "Gray code"
      ]
    }
  ],
  "word": "Gray code"
}

{
  "etymology_text": "Named after Bell Labs researcher Frank Gray, who invented this system in 1953.",
  "forms": [
    {
      "form": "Gray codes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Gray code (plural Gray codes)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "Beckett-Gray code"
    },
    {
      "word": "Gillham code"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English eponyms",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "A binary coding system in which successive values differ in just one digit position."
      ],
      "links": [
        [
          "binary",
          "binary"
        ],
        [
          "coding",
          "coding"
        ],
        [
          "system",
          "system"
        ],
        [
          "successive",
          "successive"
        ],
        [
          "digit",
          "digit"
        ]
      ],
      "wikipedia": [
        "Bell Labs",
        "Frank Gray",
        "Gray code"
      ]
    }
  ],
  "word": "Gray code"
}