"Roman ring" meaning in English

{
  "forms": [
    {
      "form": "Roman rings",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Roman ring (plural Roman rings)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "en",
          "name": "Black holes",
          "orig": "en:Black holes",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "en",
          "name": "Faster-than-light travel",
          "orig": "en:Faster-than-light travel",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "en",
          "name": "Relativity",
          "orig": "en:Relativity",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "en",
          "name": "Time",
          "orig": "en:Time",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "en",
          "name": "Time travel",
          "orig": "en:Time travel",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "A configuration of wormholes where for each individual wormhole the time difference across its mouths is such that it may not allow a closed timelike curve."
      ],
      "id": "en-Roman_ring-en-noun-x6yqpG8l",
      "links": [
        [
          "wormhole",
          "wormhole"
        ],
        [
          "time",
          "time"
        ],
        [
          "mouth",
          "mouth"
        ],
        [
          "closed timelike curve",
          "closed timelike curve"
        ]
      ]
    }
  ],
  "word": "Roman ring"
}

{
  "forms": [
    {
      "form": "Roman rings",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Roman ring (plural Roman rings)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Black holes",
        "en:Faster-than-light travel",
        "en:Relativity",
        "en:Time",
        "en:Time travel"
      ],
      "glosses": [
        "A configuration of wormholes where for each individual wormhole the time difference across its mouths is such that it may not allow a closed timelike curve."
      ],
      "links": [
        [
          "wormhole",
          "wormhole"
        ],
        [
          "time",
          "time"
        ],
        [
          "mouth",
          "mouth"
        ],
        [
          "closed timelike curve",
          "closed timelike curve"
        ]
      ]
    }
  ],
  "word": "Roman ring"
}